When Do Horse Flies Go Away? (Question)

By early August, the deerflies and horseflies begin to die off for the year, but a few of them wait until then to emerge. Just when some people begin to think they’re gone, some of the largest and ugliest of the horseflies emerge. Fortunately, there aren’t as many of them.

How long do horse flies last?

Horse flies pass through four distinct life stages: the egg, larvae, pupae, and adult fly. For most species, this sequence takes about one year to complete in full, though adult horse flies typically only live for 30-60 days.

What time of year are horse flies active?

Only the female horse fly drinks blood, and the flies tend to be most active during the months of July and August; this is because the females of the species need blood from a vertebrae animal to give birth.

What time of day do horse flies go away?

Horse flies do not only prefer the outdoors (especially near pools of water, like mosquitoes). They also prefer sunlight, are most prevalent in the summer months, and tend to avoid dark, shady areas. Horse flies do not come out at night.

What will keep horse flies away?

Prevention is very basic when it comes to the home. Keeping the house clean will help you avoid a whole mess of potential bug invaders. Horse flies also hate smoke, so burning candles or incense can help keep them away. Citronella candles will also deter other biting insects.

Why do horseflies chase you?

Horseflies bite to ingest blood which is rich in protein. The protein is needed to develop their fertilized eggs. And yes, horseflies will chase you down to get their meal.

Do horse flies lay eggs in your skin?

Like female mosquitoes, female horse flies require a protein meal to produce the eggs that will grow into the next generation of horse flies. Using these tiny blades, horse flies cut open their victim’s flesh and drink from the blood that pools in the wound. These bites can result in irritation and swelling.

What color attracts horse flies?

In addition to motion, deer flies and horse flies are attracted to dark colors, specifically blue, according to instructions on how to make a deer fly trap written by Russell Mizell at the University of Florida. And they don’t appear to be as attracted to light colors or white.

Can horse flies bite through clothes?

‘Horsefly females have such strong, powerful mouthparts that they can sometimes bite you through your clothes,’ he says. ‘But obviously they are more likely to go for bare skin. ‘ It’s probably best to opt for loose-fitting clothing.

Are horse flies aggressive?

Yes, horse flies are considered to be dangerous to both people and animals. Female horse flies are aggressive and their bites are very painful because their mouthparts tear at the skin of their victim instead of simply piercing it.

Why do horse flies bite me and not others?

Only females bite because they need blood to produce eggs. They have jagged, saw-like teeth which slice open skin, then they release an anti-coagulant to stop the blood from clotting while they enjoy their meal.

How long do horse flies live indoors?

Horse fly: Lifespan 30-60 days Horse flies are similar to house flies in that they have a similar lifespan. They are larger than houseflies and can grow to be the size of a bumblebee.

How do you keep horse flies from biting people?

Here are a few things you can try no your next trail run to help avoid horse-fly bites.

  1. Bug Spray – Picaridin has been said to effectively ward off horse-flies.
  2. Some say horse-flies are attracted to blue for some reason.
  3. Wearing a buff or/and hat on your neck and head will help keep them off your skin.

How do you keep horse flies away naturally?

Use vinegar as a natural fly spray for your horse. You can use 2 cups of vinegar with 1 cup of water and 1 cup of Avon Skin So Soft bath oil mixed with 1 tbsp. of Eucalyptus oil. You can also add a tbsp. or two of citronella oil to this mixture.

Where do horse flies nest?

Horse fly development sites are freshwater and saltwater marshes and streams, moist forest soils and even moist decomposing wood. Females usually deposit egg masses on wet soil or vegetation that overhangs water. Larvae are active in moist or wet organic matter and look similar to house fly maggots.

How do I get rid of horseflies on my horse?

To make a dish soap spray, take an empty spray bottle and add 4 tablespoons of dish soap, 2 cups of white vinegar to it, then add 1 cup of warm water, shake the mixture and your dish soap spray is ready. Spray it on horse flies and watch them dying instantly.

How to Keep Horse Flies Away from Your Yard

Horse flies are well-known for their painful bites, which are caused by their scissor-like jaws. Female horse flies, like female mosquitoes, are attracted to your blood because it provides them with nutrition. (Male horse flies are attracted to nectar mostly.) A horse fly bite, on the other hand, will result in a loud “ouch!” unlike a mosquito bite, which may not be recognized until it begins to itch. If you have a problem with horse flies in your yard, follow these guidelines to help protect yourself, your family, and your pets (or livestock).

What Do Horse Flies Look Like?

As one of the biggest flies on the planet, they are reasonably easy to detect, yet they can be tough to thwart due to their size. In order to establish whether or not you have horse flies, look for the following features. Horse flies have extremely huge and robust bodies that range in length from 3-4 inches to 1-14 inches. A variety of colors are available, ranging from dark brown to grey to black. Their eyes are huge and can be either green or black in color.

Maintain Your Yard

The fact that they are one of the biggest flies on the planet makes them reasonably easy to detect, yet they can be difficult to combat. In order to detect if you have horse flies, look for the following characteristics: Horse flies have extremely huge and robust bodies that range in length from 3-4 inches to 1-1/4 inches. Their colors range from dark brown to grey to black, depending on the species and environment. Eyes: They have huge eyes that can be either green or black in color, depending on their species.

Remove Garbage

As one of the biggest flies on the planet, they are reasonably easy to detect, yet they can be tough to suffocate. If you suspect you have horse flies, look for the following features. Horse flies have very huge and sturdy bodies that range in length from 3-4 inches to 1-14 inches. Their colors range from dark brown to grey to black in appearance. Spectacles: They feature huge eyes that can be either green or black in color.

Clean Up after Pets

Horse flies, like many other insects, are drawn to the excrement of domesticated animals. The summer months will necessitate more regular yard cleanups if you have a canine companion, otherwise you may find yourself with a horse fly infestation on your hands.

Burn CandlesTorches

If you’re hosting a backyard BBQ or other outdoor celebration, burning citronella candles and lighting torches will help keep horse flies away from your guests and prevent them from attacking them. Horse flies are attracted to the smoke and aroma created by citronella oil, so using it can help keep them away.

Kill and Prevent Horse Flies

See the article in its original context from July 21, 2002, SectionCN, Page14 of the New York Times Magazine. Purchase Reprints It is only available to home delivery and digital customers who have access to the TimesMachine. Residents, particularly those who are spending the weekend at the beach, have undoubtedly already noticed, but those pesky horseflies and deerflies will be at their worst from now until the end of the month. When they bite, they are the ones that make you jump out of your skin.

  • Magnarelli, the state entomologist, who noted that this month has been no different from any other month this year in terms of complaints.
  • They have a valid motive for doing so.
  • Throughout all, there are around 50 different types in the state.
  • They will automatically attempt to land on a person who has been swimming in the water.
  • It is the females’ job to bite people and animals in order to obtain the blood they require for depositing their second batch of eggs for the year.
  • It’s the greenhead horsefly, one of the worst and most prevalent bugs on the east coast, whose brightly colored eyes and aggressive nature afflict people from New Jersey to Cape Cod, to name a few places.
  • On shore, he said that “they were biting us in the boat, and they were biting us in the boat.” In addition, he stated that there is “no effective means to regulate them.” “It has been attempted.

In addition, they are too large to be destroyed by sprays.” Mr.

If the black-legged tick (also known as the deer tick) bites the same animal that the horseflies attack, it is possible that the deerflies are a part of a cycle that conveys a disease to the ticks, which in turn passes it to humans.

Magnarelli is collecting samples of deerflies this summer in order to conduct a research in which he aims to determine whether these flies are aiding in the transmission of the blood sickness human granulocytic ehrlichiosis to the microscopic ticks that carry the disease Lyme.

Every year in Connecticut, around 70 persons are infected with human granulocytic ehrlichiosis.

If the flies do really carry disease-causing chemicals, the deer they bite can transmit the disease to more ticks, which in turn can transmit the disease to humans.


He looks for highways that pass through forested, moist, or coastal locations, where the flies are likely to be waiting for their next meal.

They will follow you if you are running through the area.

He claims that certain horsefly species may wander up to a quarter-mile, whereas deerflies tend to stay close to the location where they were born.

Because cows, horses, and deer are less well-equipped to defend themselves against flies, flies frequently bite the legs of these huge species.

“I’ve seen them riding a horse,” I said.

The mouth parts of a mosquito may enter and puncture a capillary, while the mouth parts of a horsefly or a deerfly are saw-like in shape, making them less effective.

Horseflies and deerflies, as venomous as they may appear, play an important role in maintaining the balance of nature.

Their larvae resemble maggots, and they emerge as maggot-like larvae from eggs deposited the previous year each spring.

They even consume one another.

Then, while some types begin to fly around in late May and early June, the majority of them do not begin to fly until mid-July.

Afterwards, they begin biting in order to lay a second and, maybe, a third batch of eggs in order to reproduce.

He recommends that people follow the example of electrical lineman, who wear helmets that have been treated with bug repellant.

Just when some individuals are beginning to believe that the horseflies are no longer there, some of the largest and most obnoxious of them appear.

Fortunately, there aren’t as many of them as there used to be. In addition, the most essential thing to remember, according to Mr. Magnarelli, is that they “are not nearly as deadly as ticks.”

Horse Fly Control: Get Rid of Horse Flies in the House

  • A horse fly’s body can be anywhere between 12 and 14 inches long depending on its size. Color: They are either black or gray in appearance. Eyes: People with huge, dazzling green eyes are common. Antennes: Horse flies all have antennae that are shorter than the length of their bodies


The female horse fly, which feeds on blood, has blade-like mouthparts that cut tissues and blood arteries, causing blood to flow to the wounds they produce. Females then soaking up blood with their sponge-like mouthparts is what they are known for. Males solely eat on pollen and nectar, and their mouthparts are identical to females’, but considerably weaker.

Horse Fly vs. Deer Fly

Horse flies and deer flies are closely related, and both are members of the Tabanidae family. The two most distinguishing characteristics of them are their total size and the shape of their wings. Horse flies are often significantly bigger than other species, with a stouter body and a very massive head with extremely huge eyes. When it comes to their wings, they are often transparent or hazy, whereas deer flies have black bands or patches across their wings.


While male horse flies feed on pollen and plant nectars, female horse flies are aggressive blood feeders, whilst female horse flies do not.

Finding Prey

When it comes to finding hosts, female horse flies employ a combination of chemical and visual signals in the same way that other blood sucking insects do, such as mosquitoes. A long-range indication provided by warm-blooded animals attracts horse flies from a distance, whereas visual cues such as motion, size, form, and dark color attract horse flies from a shorter distance, according to the National Horsefly Association.


They hardly seldom bite close to the head. In addition to animals of practically all sizes, horse flies also have a wide range of hosts that include humans and their pets, as well as cattle. If a female horse fly is interrupted while attempting to feed, she will fly away but immediately return to bite another host, or she will proceed to another host to take a whole blood meal from that host.

Horse Fly Bites vs. Deer Fly Bites

Large, non-moving creatures are frequently bitten on the legs or torso by female horse flies. Deer flies, on the other hand, attack moving hosts and tend to target high-up on the body, such as the head or neck, to feed.


When someone is bitten, they may experience the following symptoms and bite reactions:

  • The bite area will swell and become itchy, then the swelling will subside. Itching and scratching of bite wounds that persists for an extended period of time and can result in subsequent bacterial infections if the bite is not cleaned and sanitized
  • The fact that horse flies inject anticoagulant-containing saliva while feeding on humans increases the risk of significant responses, particularly among those who are strongly sensitive to the anticoagulant chemicals. An itchy rash all over the body, wheezing, swelling around the eyes, swelling of the lips, and dizziness or weakness are all possible symptoms.

ReproductionLife Cycle

Horse fly growth areas include freshwater and saltwater marshes and streams, wet forest soils, and even rotting wood that has soaked up moisture from the environment. In most cases, females lay their egg masses on damp soil or vegetation that overhangs bodies of water. Larvae are active in organic stuff that is damp or wet, and they have a similar appearance to house fly maggots. Depending on the species, horse flies have anywhere from 6 to 13 larval stages. The pupal stage begins in the spring after the last larval stage has completed its overwintering period.

Fertile females will deposit their eggs on the undersides of leaves, and the larvae will hatch out and drop off the leaf in around 2-3 days after the eggs have been laid.

The majority of horse fly species produce just one generation each year, but some can take up to two years to complete their life cycle, according to the CDC.

Horse Fly Larvae vs. Deer Fly Larvae

Water sources such as freshwater and saltwater marshes and streams, wet forest soils, and even rotting wood can serve as breeding grounds for horse fly larvae and adults. Females normally lay their egg masses on damp soil or vegetation that overhangs bodies of water, according to the species. Unlike house fly maggots, larvae are active on organic stuff that is both damp and humid. A horse fly’s larval stage can last anywhere from 6 to 13 days, depending on its species. The pupal stage begins in the spring after the last larval stage has completed its overwintering period and emerged.

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Fecund females will lay their eggs on the undersides of leaves, and the larvae will hatch out and fall off the leaf in approximately 2-3 days.


Horse fly growth areas include freshwater and saltwater marshes and streams, wet forest soils, and even rotting wood that has been exposed to moisture. Most of the time, females lay their egg masses on damp soil or vegetation that overhangs a body of water. Larvae are active in organic debris that is damp or wet, and they resemble house fly maggots in appearance. Horse flies go through a total of 6-13 larval stages, depending on which species they are. The pupal stage begins in the spring after the last larval stage has overwintered.

Fertile females will deposit their eggs on the undersides of leaves, and the larvae will hatch out and drop off the leaf in approximately 2-3 days.

Prevention Tips

However, even the most potent insect repellents are only somewhat successful in keeping insects away. A better alternative for prevention is to cover and protect exposed areas of the body in order to lessen the probability of being bitten by horse flies.

The Life Cycle and Lifespan of a Horse Fly

Horse flies are notorious for having one of the most painful bites in the insect world, and their bites are particularly terrible in children. Women with razor-sharp mouthparts rip through the skin of humans and animals alike, leaving stinging (and frequently annoying) wounds in their wake. However, understanding the many stages of the horse fly’s life cycle and breeding behaviors might assist you in bringing their populations under control.

What’s a horse fly?

Biting flies belonging to the Tabanidae family are commonly referred to as horse flies. In all, there are about 4400 different fly species in this huge group. Members of this family are often referred to as deer flies or yellow flies, depending on where they are found. In practically every part of the world, horse flies may be found, and they are a serious problem for both people and animals. Horse flies are one of the world’s most loathed summer pests, and they’re typically despised for their painful bite and their tenacity — once they’ve clamped onto a victim, they’re not likely to release go until they’ve tasted blood themselves!

This is because to the sharp, knife-like mouthparts that they utilize to slice at the skin of their prey.

It is also possible that horse fly bites could trigger allergic reactions in certain persons, and that scratching the bites will result in skin infections. They also frequently bounce from host to host, which increases the risk of spreading human and animal infections as they eat.

How long do horse flies live?

Biting flies belonging to the Tabanidae family are referred to as horse flies in common parlance. In all, there are about 4400 different fly species in this large group. Members of the deer fly family are sometimes known as yellow flies or deer flies, depending on where they live. In practically every part of the world, horse flies may be found, and they are a serious nuisance of both people and animals. Hailed as one of the world’s most feared summer pests for their terrible bite and tenacity (after they’ve clamped on to a victim, they won’t let go until they’ve tasted blood), horse flies are hated the world over.

When they feed on the blood that collects in the wounds, they release salivary secretions that can aggravate the itching, irritation, and discomfort already present.

Additionally, because they frequently move from one host to another, they have the potential to transmit human and animal illnesses when eating.

What is the horse fly life cycle?

It is possible to separate the horse fly’s life cycle into four different stages: the egg stage, the larval stage, the pupae stage, and the adult stage.


All insects begin their lives as eggs, including horse flies, which are no exception. Horse flies lay their eggs in clusters that can range in size from 100 to 1000 individuals in number, depending on the species. When the eggs are first laid, they are cylindrical in shape and creamy white in color; however, they soon darken and become gray or black in color as they mature. They prefer to deposit their eggs on the vertical surfaces of aquatic plants, however they may also lay eggs on sticks and rocks if the conditions are right.


Insect larvae of the horse fly develop into six to thirteen distinct phases during the course of their lives, which may be aquatic, semi-aquatic, or terrestrial in nature (depending on the species). Once spring comes along, the majority of horse fly species overwinter in their final larval stage, which is then transformed into a pupae.


Horse fly pupae are brown in color and elongated, with a rounded front end and a tapering back end. They are the larval stage of the horse fly. In the case of the horse fly, the pupal stage can last anywhere between 3 and 6 weeks, following which the adult flies emerge.


It is the adult horse fly that emerges once the pupal stage is complete. Equines are huge (10-25 mm long), with brownish, hairy bodies and transparent or smoky wings that are visible in the sunlight.

Worth knowing!

The adult phase of the horse fly lifecycle is the one you’re most likely to come across, albeit only the females are capable of biting at this stage. Their mouthparts are more powerful than those of the males, who mostly feed on nectar and nectar-like substances. This is due to the fact that female horse flies, like mosquitoes, require blood in order to mature and lay their eggs.

How can you control horse flies?

Humans and animals alike can suffer from the brutally painful bite of adult horse flies, which can be a serious source of concern. If you find yourself seeing these bloodsuckers on a frequent basis throughout the summer, you may want to consider putting in place control measures to reduce their numbers.

Remove their breeding sites

Adult horse flies bite with an incredibly painful bite, and they may be a severe nuisance to both humans and domestic animals in their breeding grounds. You should consider applying control methods to reduce the quantity of these bloodsuckers if you routinely come across them throughout the summer months.

Install screens

Of order to keep horse flies out of your home and away from your animals, you should place screens around doors and windows in your home. This establishes a physical barrier that will aid in the prevention of horse flies and other nuisance insects (such as mosquitoes, houseflies, androaches) from entering the house.

Personal protection from horse flies

It is simple to avoid horse fly bites this summer, as long as you take the necessary precautions to keep yourself safe. Horse flies (and other biting insects) can be prevented from biting your skin by wearing long, loose-fitting clothing and applying bug spray (having DEET or other insect-repelling substances).

Sticky paper and traps

Horse fly populations can be reduced by hanging sticky paper and putting out traps, among other methods. Install these traps in areas where there is a high amount of horse fly activity.

Chemical control

If your horse fly problem is getting out of hand, you may want to consider using chemical control tactics to combat the problem. Flies can be killed in large numbers by insecticidal sprays, fogs, and mists (particularly in confined areas), and residual pesticides can be used in barns and sheds to keep flies under control. These are often sprayed to walls and ceilings where flies congregate, and they kill any bugs that come into touch with the surfaces they have been put on.


In addition to their aggressive nature and the severe bites they inflict on their victims, horse flies are also known for their stinging ability. They are mostly a problem for horses and cattle, although they will also bite people from time to time (and any other blood-filled creature they can find). Horse flies go through four unique life stages: the egg, larval, pupae, and adult fly, which are all visible on the surface of the water. For the majority of species, this process takes around one year to complete in its entirety, however mature horse flies only survive for 30-60 days on average.

Therefore, by reducing unneeded water sources in and around your house, you may restrict their numbers to a bare minimum.

How to Get Rid of Horse Flies – Facts & Control Techniques

Horse flies are one of the most vicious species of insects on the planet. Horse flies, in contrast to normal house flies, have mouth parts that are capable of cutting and tearing. Horse flies (especially female horse flies) are a nuisance to livestock because they settle on the bodies of cattle and bite them in order to take their blood. In addition, unlike mosquito bites, the horse fly bite is extremely painful. They have jaws that are similar to scissor-like and are capable of tearing flesh.

In order to better understand how to get rid of horse flies, let us first examine their physical characteristics in order to recognize them more readily.

Identifying a Horse Fly:

Horse flies have a yellowish-brown or blackish coloration to their wings and bodies. It is around 20 to 25 mm long, has a large head, and has hairs all over its body. They are remarkably similar to honey bees, with the exception of the fact that they only have one set of wings. The undersides of the wings are coated with subtle smoky patches. The eyes of a Horse fly are exquisitely colored with rich metallic color tones that shimmer in the light. Females have complex eyes that are dichoptic (separated), whereas males have holloptic (continuous) eyes.

  • Horse flies are most commonly found in low-lying meadows near creeks, streams, and tanks, where they breed and reproduce.
  • Female species feed on the blood of animals, whilst their male counterparts are pollen gatherers.
  • Take a look at this article: How Do You Attract Flies Into Your Home Or Surrounding Environment?
  • Female horse flies require a blood meal before they can lay eggs because it supplies them with the appropriate levels of protein they require to reproduce successfully.
  • Evolution: Eggs are placed on or under gravels or plants, generally close to a water supply, and hatch after about a month.
  • Furthermore, at this period, they graze on little insects or responses.
  • During the larval stage, which can last up to a year, the larvae burrow into the earth and begin the process of pupation.
  • Adult flies emerge from the puparium around 3-10 weeks after hatching.
  • Getting bitten by a horse fly is quite unpleasant
  • They are carriers of illnesses such as leucocytozoan
  • They cause animals to lose weight
  • And they cause livestock to die. Horse flies have also been linked to the transmission of illnesses such as anaplasmosis, hog cholera, tularemia, and anthrax, among others.

Few Interesting Facts about Horse Flies:

  • The horse fly’s biting is quite unpleasant
  • Because they transmit infections such as leucocytozoan, they induce weight loss in animals. Anthrax, anaplasmosis, hog cholera, tularemia and anthrax are among illnesses that horse flies are suspected of transmitting.

How to Get Rid of Horse Flies:

Let’s have a look at how to get rid of horse flies now that we’ve learnt so much about them. You may learn how to regulate them in this area, which includes a number of suggestions.

1. Using Disposable Fly Traps:

Let’s look at how to get rid of horse flies now that we’ve learnt a lot about these pesky insects. You may learn how to regulate them in this section, which includes a few tips.

2. Using a homemade Fly Trap against Horse Flies:

As I previously stated, horse flies are drawn to dark moving things; thus, we will utilize this knowledge to our advantage and construct a trap that will attract horse flies and kill them. To construct this trap, we will need the following materials:

  • A difficult string to work with
  • A medium-sized ball with a dark color and a round shape
  • A fly paper (either commercially available or handmade)
  • A stool, to be precise.

To construct the trap, tie the dark colored ball to the string and secure the free end of the string to the bottom of the stool. After that, wrap the fly paper over the stool’s legs and secure it in place. Once you’ve done that, hang the stool in the area where the horse fly infestation is prevalent.

Every few hours, simply press the ball to the point where it begins to sway in the breeze. The horse flies will be attracted to the dark colored ball because of its swinging action. When they approach close to the trap, they attempt to land on it and become entangled in the fly paper.

3. Coke Bottle Trap made with Rotten Meat:

To assemble the trap, connect the dark colored ball to the string and tie the open end of the line to the bottom of the stool, as shown. Afterwards, wrap the fly paper over the stool’s legs and secure it with tape. Once you’ve done that, hang the stool in the area where you’ve got a horse fly problem. Simplest method: every few hours, press the ball till it begins to swing in the air. In addition, the horse flies will be attracted to the swinging action of the dark colored ball. When they approach close to the trap, they attempt to land on it and become entangled in the fly-paper lining.

  • A Coca-Cola bottle that has been emptied
  • To cut the bottle, you’ll need a sharp knife or a pair of scissors. Use a drill or any other sharp tool to make some holes in the ground
  • Cellophane tape is a type of adhesive used to seal packages. rotting meat weighing 50-100 grams

To construct this trap, begin by slicing the coke bottle with a knife, as illustrated in the accompanying illustration. Following that, drill a 1 cm hole in the bottle cap in the manner illustrated. After that, place the decaying meat pieces in the lower portion of the bottle with a little water in it. Then, as illustrated, flip the upper section upside down. Cellophane tape is used to ensure that the edges are firmly secured. Place these traps in close proximity to the contaminated area (away from your cattle).

Moreover, once they have entered the bottle, it will be impossible for them to get out on their own.

This is supported by research.

4. Sticky Fly Paper Trap with Odour Baits:

Many individuals have had success in reducing horse flies by employing huge sticky fly traps in conjunction with an attractant or other attractant. It has also been demonstrated that when normal fly paper traps are used in conjunction with scent baits, the effectiveness of the traps rises dramatically. To make this work, you will first need a large sticky fly paper trap, which you may use in conjunction with smell baits if you choose. You might use any of the following ingredients to make odor baits:

  • The presence of carbon dioxide (CO 2) in bovine breath attracts horse flies, which are drawn to carbon dioxide in general. To attract them, you might use a CO2 cylinder or ‘dry ice’ to catch their attention. However, in order to make this function under real-world field settings, enormous volumes of CO2 gas would be required. Acrylatone (Nail Polish or Varnish Remover)– Acrylatone is also a component of cow breath, which means that many species of horse flies are drawn to this liquid to a substantial degree. One of the constituents of cattle sweat, octen-3-ol, is a fly attractant to a modest amount. It is a component of human sweat, as well as a component of cow sweat. Due to the fact that octenol is a highly expensive chemical, it is exclusively employed in laboratory research against horse flies
  • However, this is changing. Ammonia (NH3 vapour)– Ammonia is a component of bovine urine, and it has been seen to attract some species of tabanids
  • It is also a component of feces. It was cow urine that was discovered to attract horseflies, and it had to be matured for at least a week before it could be used. Furthermore, because it is readily available and very simple to administer, it is a popular attractant, particularly among cattle ranchers.
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5. Umbrella Type Horse Fly Trap:

The use of an umbrella trap has been shown to be quite successful against horse flies. You will need the following things to complete this project:

  • When it comes to horse flies, an umbrella trap has been shown to be quite successful. Several items will be required in order to complete this project.

The four pieces of plastic sheeting should be joined together using stitching or staples to form a pyramid shape, as indicated in the figure below. The pyramid should be around 4 feet high and 3 feet broad along each of its four bases, depending on the size of the materials used. Following that, a ring should be placed to each bottom corner of the trap in order to attach guy lines that keep the trap in place. After that, join the 6 foot pole in the center of the pyramid along with the rest of the pyramid.

It is important that after the trap is properly assembled, the ball should rest slightly below the plastic sheets.

Fix the jar lid upside down and use a 2 inch hole punch to make a 2 inch hole in both the lid and the cardboard plate.

This jar will be used to collect flies, which will be placed inside.

After that, secure the guy lines to some supporting poles so that they may act as tent ropes to hold the canopy in place. And the horsefly trap is now ready to grab its prey.

6. Manning Trap for Horse Flies:

The Manning trap operates on the same principle, namely, luring flies with a dark moving item and then catching them in a container after they are attracted. A conventional manned trap looks much like the one seen above. Please keep in mind that there are many various methods to design a manned trap, and I have just illustrated the most basic one here for illustration purposes. In addition to manning traps, horse buddy traps and H-Traps are modified versions of the manning trap. To construct a manning trap, you would need the following materials:

  • The following items: a tripod stand or sufficient wood to construct your own stand
  • A sheet of plastic or a fabric
  • An opaque ball of black color
  • A little funnel
  • A piece of string
  • A bottle of anything

First and foremost, if you don’t already have one, construct a tripod stand of 5 feet in length. After that, drill a 3 – 5 cm hole into the top of the tripod and screw the funnel into place over the hole. Afterwards, attach the bottle to this in the manner depicted in the figure above. To attach the bottle to the funnel, you can use cellophane tape if necessary; however, make sure the bottle is securely fastened to the funnel before proceeding. The dark colored ball should be connected to the string, which should be tied to the bottom of the tripod so that it hangs at least 2 feet over the tripod legs.

As a result of this, you should maintain the trap close to the contaminated region and you should soon see that the bottle is full with dead horseflies.

7. Homemade Repellents for Horse Flies:

Several natural oils have been shown to repel horseflies, and you might use them to make a repellant for yourself or your pets if you know what you’re doing. Repellent number one: To produce this repellant, combine the ingredients in the following order and keep them in a container.

  • 1-1/2-cup Avon Skin So Soft (Bath oil)
  • 1/2-cup water
  • 1/2-tablespoon eucalyptus oil
  • 1 cup white vinegar

You may apply the repellant straight to the skin of your dogs if you so desired. Please with your veterinarian before using this product. Repellent number two: To produce this repellant, combine the ingredients in the following order and keep them in a container.

  • Light mineral oil, 1/4 cup lemon juice, 1 teaspoon citronella oil, 1 teaspoon eucalyptus essential oil, and 1 teaspoon lemon dish soap are all you need.

You may apply the repellant straight to the skin of your dogs if you so desired. Please with your veterinarian before using this product. Repellent number three: To produce this repellant, combine the ingredients in the following order and keep them in a container.

  • 3 components: 1 part lavender oil, 2 parts water, 2 parts rubbing alcohol

You may apply the repellant straight to the skin of your dogs if you so desired. Please with your veterinarian before using this product. Read this article for more information: Natural oils to repel flies.

8. Using Insecticides:

Although it is theoretically feasible to kill horse fly larvae using pesticides, doing so would result in the water being harmful or contaminated due to the fact that they reside near streams or rivers. As a result, treating them when they are in the larval stage is very impossible. Field experiments, on the other hand, have demonstrated that daily treatment of cattle with a naturally occurring pesticide known as’synergized pyrethrins’reduces the bite rates by horse flies while having no negative effects on the cattle themselves.

Concentrated pyrethrins pesticide may be purchased from any farm supply or agricultural chemical company.

For example, if you want to treat horses, you should choose a formulation that has been labeled particularly for this kind of animal.

The cattle must be treated with the pesticide on a regular basis in order to achieve the optimum effects. However, by spraying it on every other day, it is possible to attain some kind of control. Use a sponge to apply the pesticide to the cattle if you don’t want to spray it directly on them.

9. Using Dish Soap and Vinegar Spray to kill Horse Flies:

When it comes to flies, dish soap is quite efficient against most breeds, including horse flies. It is beneficial to use a dish soap that contains borax, which is an insecticide; the greatest thing about using a dish detergent that contains borax is that it has no negative effects on you or your animals. For a dish soap spray, take an empty spray bottle and fill it with 4 teaspoons dish soap, 2 cups white vinegar, and 1 cup warm water, shaking the entire time. Your dish soap spray is now complete.

10. Commercially available Horse Fly Repellents:

I’ve seen numerous products that claim to be effective against horse flies, but the most of them are ineffective. However, there are a few products that are very effective in combating them. These are the products:

  • Rtu Equisect Botanical Fly Repellent Rtu Spray– This is a natural fly spray that repels 5 different types of flies, including horse flies. It is available in a variety of scents. Check out the book on Amazon
  • Pyranha Wipe N Spray– This insect repellent includes pyrethrin (which is believed to be the safest pesticide available) and is effective against horse flies and other biting insects. Check out the book on Amazon

Please remember to consult your veterinarian before using any of these items. Read this article for more information: Natural oils to repel flies.

Prevention Tips against Horse Flies:

  • Maintain the cleanliness of your animals. Maintain a clean barn at least twice a week by cleaning out the waste and spilt feed. Aside from that, you might apply pesticides on the dung heaps, which would prevent the larvae from forming. Ensure that there is no standing water in the shed and that you have a proper drainage system in place so that there is no stagnant water where the horse flies can lay their eggs. It is necessary to trim the grass and weeds in order to make the environment unsuitable for horse flies. The use of a strong fan in animal sheds can greatly reduce the number of horse flies that enter the facility. Use ear nets, face masks, and repellent tags on your animals to protect them from predators. On Amazon, you can find face masks with ear nets
  • They are reasonably priced.

Recommended Reading: How to Get Rid of House Flies

Horse Fly Bite Symptoms:

Horse fly bites are quite uncomfortable. The following is a list of signs and symptoms that might help you determine if a wound is caused by a horsefly bite or not:

  • A horsefly bite results in thick, red skin that is difficult to remove. Itchy skin accompanied with pain
  • Early signs and symptoms of bacterial infections
  • Sometimes the skin remains red and inflamed for several days after the incident. Some people may develop a skin rash, hives, or wheezing as a result of the allergy
  • Others may not. Swelling around the eyes and lips is another symptom that some people encounter.

How to Treat a Horse Fly Bite:

It is extremely vital to treat a horsefly bite as soon as possible. To cure a bite, follow the instructions outlined below: Disinfect the area: To begin, thoroughly wash the area with soap and water to remove any remaining contaminants. You might also use a disinfectant that is based on alcohol or vinegar. If you are outside and unable to sterilize the area at that moment, cover the wound with saliva until you can disinfect the region. Saliva includes the protein Histatin, which has healing properties, and this will help you to heal the bite until you can get indoors and properly treat the situation.

  • Medications for Allergies: If the itch is becoming intolerable, you might try using a hydrocortisone cream directly to the wound.
  • Monitor the Wound: Keep an eye on the wound since there is a potential that it can get infected with germs.
  • So that was the end of it.
  • Also, I’d be interested in knowing if you have any other top-secret strategies for getting rid of horse flies.

Horse Flies

(News story for the 28th of May, 2020.) Horse flies have been driving you insane lately, haven’t they? This week, I had a few phone calls from concerned people who wanted to know more about horse flies and what they might do to avoid them. We haven’t even finished dealing with the assault of buffalo gnats, and now horse flies are consuming the lives of people. Although there is nothing you can do to limit the number of horse flies in your region, there are certain repellents you may use that may make your life a little easier.

  1. Horse flies are more common than deer flies in the United States.
  2. Adults have a life span of 30-60 days, and in order to create viable eggs, the females must ingest a meal of blood.
  3. Male flies do not bite, whereas female flies do bite.
  4. They enjoy aquatic plants, and their populations tend to be more numerous in damp and forested environments.
  5. They will lay in wait in shady regions until a host walks by, at which point they will administer a severe bite and consume their prey’s blood.
  6. Horse flies are effectively deterred by insect repellents containing DEET, citronella, or geraniol.
  7. Find a permethrin-based clothing treatment in the camping area of your local shop that will keep horse flies, ticks, mosquitoes, and other insect pests away from you and your belongings.

Animals will benefit from the use of pyrethroid insecticide pour ons, ear tags, and collars on their backs.

The two hours before sunset and the two hours immediately after sunset are also high-activity times.

They are native to North America and thrive in our moderate temperature and forested, damp places, which they find to be particularly appealing.

Wishing you the best of luck!

M., ed (1998, February).

The date was May 5, 2020, and the source was Jessie Hoover works as a County Agent at the LSU AgCenter, where she is responsible for horticulture in the parishes of East Feliciana, West Feliciana, St.

More information on these or related topics can be obtained by contacting Jessie at 225-683-3101 or by visiting the website www.lsuagcenter.com.

‘American horse fly’ is a term used to describe a flying horse in the United States. The image is courtesy of Sturgis McKeever, Georgia Southern University, and Bugwood.org.

Horse Flies and Deer Flies

|Download the PDF version of ENTFACT-511: Horse Flies and Deer Flies.

by Lee Townsend, Extension EntomologistUniversity of Kentucky College of Agriculture

Horse Fly and Deer Fly are two types of flies. Horse flies and deer flies are both bloodsucking insects that may be a major annoyance to cattle, horses, and people. Horse flies and deer flies are both considered to be a serious pest to humans. Horse flies are around 3/4 to 1-1/4 inches in length and have transparent or strongly colored wings, as well as brilliantly colored eyes, in most cases. Deer flies, which are smaller than horse flies and regularly bite humans, have dark bands across their wings and colored eyes that are similar to those of horse flies.

  • The quantity of flies and the severity of their onslaught varies from one year to the next, depending on the season.
  • It is possible that animals will harm themselves when fleeing from the insects.
  • For their meal, Webb and Wells projected that horse flies would drink 1 cc of blood and that 20 to 30 flies dining for 6 hours would consume 20 tablespoons of blood, according to a USDA Bulletin 1218.
  • Flies such as horse flies and deer flies are more active during the daytime hours.
  • Once they have taken up residence on a host, they slit the skin with their knife-like mouthparts and feed on the blood pool that has formed.
  • The soreness and swelling caused by bites normally subside within a few days.
  • Bites may be painful, and general first aid-type skin lotions can assist to alleviate the discomfort.
  • In terms of animal pests, male flies are of no significance because they feed on nectar.
  • The fly’s painful bites usually provoke a response from the victim, and the fly is compelled to move on to another host as a result.


It is the muck around the borders of ponds and streams, as well as marshes and seepage sites, where horse fly and deer fly larvae grow and mature. Some are aquatic, while others grow in soil that is rather dry. Females lay batches of 25 to 1,000 eggs on vegetation that grows over water or in moist areas, depending on the species. They descend to the ground and feed on decaying organic debris as well as tiny creatures in the soil or water, which they acquire via this process.

The larval stage, which can last anywhere from one to three years depending on the species, is the most common. In order to pupate and eventually emerge as adults, mature larvae must crawl to drier locations.


During the summer, deer flies are generally only active for brief periods of time at a time. Repellents such as Deet and Off (N-diethyl-metatoluamide) can give up to several hours of protection when used outside. Follow the directions on the label since some people might develop allergies after using a product for a long period of time. Also, check for age limitations. Permethrin-based repellents are intended for use on clothes alone, however they often give a longer duration of protection than other repellents.

See also:  How Much Is A Horse Cost? (Solution)

Even after a remedy has been administered, these flies will continue to swarm and annoy you.

Hats with mesh face and neck veils, as well as neckerchiefs, may provide some protection under severe circumstances.


Horse flies and deer flies may be a real annoyance when they congregate near swimming pools. They may be drawn to the water by the gleaming surface or by the movement of the swimmers in the water. There are currently no viable recommendations for addressing this issue. Permethrin-based sprays are approved for use on animals and horses, according to the label. Because these pesticides are extremely unpleasant to the flies, they are forced to flee nearly soon after landing on the surface. Frequently, the flies do not come into touch with the pesticide for long enough to be killed, and as a result, they continue to be an irritation.

It is possible that repeated applications will be required.

In addition, pyrethrin sprays are effective, although their effectiveness does not continue as long as permethrin.

In the daytime, if animals have access to shelter, they will be able to avoid the relentless onslaught of these vexing pests.


It is extremely difficult to detect and/or destroy the breeding sites of horse flies and deer flies, and it is nearly impossible to do so. The fact that they spawn in environmentally sensitive wetlands raises concerns about the implications of drainage or pesticide treatment on non-target creatures or water supplies. Furthermore, these insects are excellent flyers and have the ability to move in from a distance. Breeding sites may be quite large or located a long distance distant from the location where the issues are occurring.

Some changes in behavior or the use of repellents may be necessary to allow for enjoyment of the outdoors.


Some goods may not be legal to use in your state or nation, depending on where you live.

As a reminder, ALWAYS READ AND COMPLY WITH LABELED INSTRUCTIONS FOR SAFE USE OF ANY PESTICIDE! Images courtesy of the University of Kentucky Entomology Department

How to Get Rid of Horse Flies and Avoid Their Bite (DIY Trap Instructions)

It should be noted that this content may contain affiliate links. This means that if you make an eligible purchase, we may receive a small commission at no additional cost to you. The most recent revision was made on February 8, 2022. While some people may think I overreact when it comes to flies, I don’t think anybody could accuse me of doing so when it comes to the horse fly. Despite the fact that they are related to common houseflies, these bugs live up to the moniker “vicious bloodsuckers.” Unfortunately, because these pests provide some environmental value and frequently nest in protected locations, it is impossible to entirely eliminate horse flies from the ecosystem.

Get a free quotation from the most reputable pest control businesses in your neighborhood.

Because the phrase “horse fly” is frequently abused, it’s always a good idea to double-check that your target is, in fact, a horse fly before investing in control tactics that may or may not be effective against other fly or insect species.

Know Your Enemy

Horse flies are a pestilence that, fortunately, only manifests itself in large numbers during a few months of the calendar year. However, although huge house flies and horse flies are sometimes referred to as one species, the latter is in fact a distinct species that is far worse than a simple insect that vomits all over your food. Females are so infamous during mating season that they are referred to as “maddening gadflies” in Shakespeare’s play Hamlet. Once you’ve determined that you’re dealing with a horse fly, it’s rather simple to get rid of them because of their hunting tactics.

What Does a Horse Fly Look Like?

The horse fly, which has been given the moniker “dun-fly” because of its subdued hues, has dull yellow patterns that mimic those of the abee. These insects have extremely big eyes, extremely short antennae, and extremely pointed mouthparts. These flies have bodies that are broader than the usual fly, and they may grow to be as long as an inch long.

Where do Horse Flies Come From?

“From the deepest, darkest depths,” says someone who has recently been bitten in response to your question. It is believed by some scientists to be true that the horse fly likes to reproduce on wet soil near huge bodies of water, but that it is capable of traveling up to 30 kilometers. While they favor woodland areas, they can be found in practically any land-based location on the planet, with the exception of the polar regions.

What do Horse Flies Eat?

Contrary to common belief, only females consume blood, which they utilize to help in the reproduction of their young. Overall, adult horseflies prefer nectar and are really necessary for the survival of particular plants because of their nectar preference.

The larvae are carnivorous and might be cannibalistic in their behavior. Even though male horse flies offer no hazard, the possibility of coming across a hungry female is sufficient justification for eliminating horse flies.

Horse Fly vs Deer Fly

Deer flies and horse flies are often confused, albeit there are several distinguishing characteristics between the two. Unlike horse flies, deer flies (which have no resemblance to deer) have black stripes across their wings as compared to the transparent wings of the horse fly. Furthermore, their bodies have a tendency to be leaner and smaller.

Horse Fly vs House Fly

Despite the fact that the horse fly and the house fly are diametrically opposed in appearance, the latter is occasionally referred to as a “horse fly” due to common nicknames. The source of this misunderstanding is from tales of some house flies as being “as large as a horse.” Despite the fact that house flies do not feed on blood, they can carry a significant quantity of germs, which can infect any food or property they come into touch with. For further information, see How to Get Rid of Cluster Flies in the House.

How to Get Rid of Horse Flies

I would normally advise against exterminating a creature, but there are no constraints and no significant environmental consequences to exterminating every horse fly you encounter. Because they frequently establish breeding grounds in protected areas, any possible environmental consequences of eradicating those who trespass into public or private land are kept to a bare minimum. The methods listed here are only a handful of the various options available for getting rid of these pests.

The Humble Horse Fly Trap

There are a variety of horse fly traps available to assist you in getting rid of horse flies. The following are some of the most effective: Do you want to leave it in the hands of the professionals? Get a free quotation from the most reputable pest control businesses in your neighborhood.

  • A bug zapper is one of the most gratifying kill traps that can be found anywhere in the globe. An unwanted insect is drawn to the light and electrocuted with a pleasing sound as a result of the attraction. The carcasses can subsequently be fed to pets or carnivorous plants as a source of nutrition. Make certain that the slats are large enough to allow a horse fly to get through. Flies-Be-Gone: A plastic bag and bait are used in this fly trap. In this case, the flies enter through a funnel and are baffled as to how to exit
  • The traditional fly paper used in houses for decades will trap horse flies as readily as normal house flies and fruit flies
  • It is inexpensive and easy to find in most grocery stores. Horse PalorH-Trap: Another commercial trap that might bring satisfaction is the Horse PalorH-Trap. Because it is designed to attract visual hunters, the horse fly will approach something that appears to be a tasty meal only to become imprisoned in a metal container that uses ordinary sunlight to slowly fry the pest to death.

Chemical Sprays

Chemical sprays that are quite safe and contain natural insecticides are available for purchase. One method is to use a regular soap spray, which may be used to suffocate most insect pests and is inexpensive. It is made up of 4 tablespoons dish soap (I like Dawn for added safety around birds, squirrels, and other garden creatures), 2 cups vinegar, and 1 cup warm water in the following proportions: Simply shake the can to combine the ingredients and spray. One advantage of using this mixture is that it is completely safe to spray plants with it.

It is derived from Chrysanthemum flowers and may be purchased in concentrated form at agricultural supply stores or on the internet, among other places.

It is non-toxic and has been shown to significantly minimize biting incidences.

DIY Corner: Two Types of Homemade Horse Fly Trap

Construction of your own traps is possible, and the results are nearly identical to those of professional ones. Container traps and sticky traps are the two basic types of traps available: both are effective.

Container Traps

With these traps, there are several variants on a subject, which is understandable.

By adding some decaying meat or acetone to the inverted soda bottle traps used for house flies, you may make them work for you as well. The Manning trap, or a version of it, is the most frequently seen. The following is an example of one variant of this trap:

  1. Build a tripod stand (or utilize an existing one) that is five feet in height or higher. You may also construct a four-legged structure. Place a piece of fabric or plastic on top of the stand to protect it. A small hole should be cut in the centre of the top surface and should be covered with a little funnel. Place an upside-down plastic bottle over the mouth of the funnel and attach it with tape
  2. Attach a strong thread or twine to the underside of the tripod and a dark, medium-sized ball to the dangling end of the rope or twine. Maintain an adequate two-foot space between your cover and the ground, while yet allowing for unobstructed visibility of the ball

Image courtesy of

Sticky Traps

These are fly paper traps, as opposed to bottle traps, because they employ fly paper instead of a bottle. One simple solution is to place fly paper near a light source that is attracting flies, as seen below. One other simple sticky trap to create is a variant of the Manning trap, which makes use of a stool that is hanging from the ceiling or another sturdy surface. A black ball is hanging underneath the stool, and the legs of the stool have been loosely wrapped in fly paper in the hopes that leaving flies may become entangled.

Despite the fact that it has a limited range, getting rid of horse flies in this manner may be a lot of fun.

How to Keep Horse Flies Away

As is true in most situations, the greatest defense against horse flies is a well-planned offensive. Horse flies are not commonly seen in the home, but they like congregating near your swimming pool and other moist parts in your home. Despite the fact that you may not be able to completely eradicate horse flies’ breeding sites, you may still get rid of them by making your own area less inviting to these pests.

Defending the Home

When it comes to the house, prevention is really essential. Maintaining a clean environment can assist you in avoiding a whole slew of potential insect invaders. Horse flies are also attracted to smoke, so using candles or incense to keep them away can be effective. Citronella candles will help discourage other biting insects in addition to mosquitoes.

Defending the Pool

Unless you have cattle, your backyard pool or pond will most likely be the source of the most trouble. It will be extremely beneficial to cover these during the height of horse fly season. You should also construct light traps around the pool area to distract and kill any intruders who chose to linger around in the vicinity. Also see: How to Get Rid of Biting Midges (Part 1).

Defending Your Livestock

A brief application of pyrethrin-based insecticides on your animals once or twice every one or two days can significantly minimize the quantity of bites. Some of the most sensitive regions of the body can be protected from bites using protective covers such as ear nets and face masks. In addition, creating a protected refuge where horses and cattle may seek shelter will assist to prevent bites, provided that the doors and windows are properly screen-ed and secured.

General Outdoor Prevention

The use of general insecticides such as Off! can be effective in the control of horse flies. Wearing bright hues might also help to minimize the level of attraction you draw. Horse flies (as well as other pests) are drawn to tall grass and rubbish, so try to keep your yard tidy and free of debris at all times. Finally, you may put up some bird feeders or suet cages to attract birds, who will also consume insects, which will help to keep the area clean.

Health Risks of Horse Flies

Females, who must extract blood in order to breed, are responsible for the vast majority of health problems.

These bites are frequently associated with the transmission of pathogens and the development of allergic responses. The experience of being approached by a hungry female may be excruciatingly uncomfortable, even in the best circumstances.

Do Horse Flies Bite?

In fact, only females bite, and even then, it’s only when they’re getting ready to spawn. These bites are more painful than other types of bites, and they can result in allergic reactions as well as the transmission of bloodborne illnesses and parasites to humans and animals. Anaphylaxis in humans has been documented to occur in a few severe cases as a result of the bite in the past.

What Does a Horse Fly Bite Look Like?

Because of the way horse flies cut into the skin, the bites and symptoms of horse flies might differ from victim to victim. The bite itself will become inflamed, painful, and itchy, and it will either welt or develop into a rash as a result of the inflammation. Other symptoms, such as dizziness or wheezing, may also manifest themselves. Do you want to leave it in the hands of the professionals? Get a free quotation from the most reputable pest control businesses in your neighborhood.

Basic Treatment

You’ll want to clean and disinfect the bite as soon as possible to avoid the possibility of infection. Additionally, you can utilize first aid sprays and salves to reduce symptoms, such as After-Bite, in addition to taking any allergy drugs that may be necessary.

Effects of Horsefly Bites on Animals

In order to avoid the possibility of infection, you should wash and disinfect the bite immediately. After-Bite is a first aid spray and salves that can be used to relieve symptoms of allergies in addition to taking any prescribed allergy drugs.

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