Facts About Black Flies & How to Keep Them Away | EarthKind (2024)

By: EarthKind

Facts About Black Flies & How to Keep Them Away | EarthKind (1)

No one likes being bitten by bugs, especially during the summer when you’re trying to enjoy the outdoors. If it’s not mosquitos you’re worrying about, it’s black flies. When these pests bite, it hurts. Their bites leave itchy red bumps, so you’ll feel it if one does get you. But if a swarm takes a liking to you? That can be dangerous.

Black flies – also known as “Buffalo Gnats” – are not mosquitoes, but it’s easy to mix them up. They are similar to the much-maligned mosquito, but with some key differences that will change how you keep them away from you.

In this article, we’ll cover facts about the black fly, DIY ways you can keep this type of pest away, and a repellent that can help you stay bite-free.

Black Fly Facts

While mosquitoes only have some niche benefits for the earth, black flies have an important role to play in the ecosystem of streams and rivers, as their larvae feed dragonflies, trout, and other fish that can be found in similar environments.

Now that you understand their importance, here are a few other facts about these pests.

  • Unlike mosquitoes, black flies only lay their eggs in clean and fast-moving running water, so unpolluted streams are common nurseries. Most people don’t have clean streams near their homes so you probably don’t have to worry about black flies in your backyard. The bad news is that because they have stricter requirements for egg-laying than mosquitoes, black flies have evolved to travel further for their blood meal: up to 40 miles from their breeding grounds in some parts of the world!
  • Black flies track prey the same way mosquitoes do. They sense and are attracted to CO2, which can be exhaled or found on skin. They are also attracted to dark-colored clothing and sweet-smelling scents.
  • Black flies can be dangerous. Their bites are painful and can cause severe allergic reactions in some people. Infestations can also be very dangerous to livestock, people, and pets. However, at least in the United States, they aren’t known to infect humans with any diseases like West Nile. You’re better off not risking it, though. In other parts of the world, black flies are one of the leading causes of blindness thanks to a parasite they often carry.

5 Ways to Keep Black Flies Away Naturally

Black flies are a little easier to avoid than mosquitoes. You don’t have to worry about them if you stay indoors, and they’re only active during the day (often soon after sunrise and shortly before sunset) so you’re safe to crack the windows open after dark.

If you are out during the day, keep these tips in mind.

1. Protect Your Skin

If you do go out, make sure to protect your skin with light-colored clothing that covers as much of your skin as possible. Since black flies often go for the hairline and the back of your neck, it can be tough to protect yourself effectively. Wear loose-fitting clothing and hats with netting when you know these pests are active.

2. Use a Repellent

If you’re going to use bug spray, avoid sprays with DEET and opt for sprays with Picaridin. Picaridin is a compound bioidentical to those found in long black pepper plants and sprays using this are safer on skin compared to other options. Stay Away® Mosquitoes is an insect repellent that uses Picaridin as the active ingredient and can work to repel black flies.

3. Apple Cider Vinegar

Since we know it’s sweat and sweet scents that attract these pests, we need to make sure that our sweat won’t be on the menu. If you know you’re going to be in a place with mosquitos or black flies, consider drinking apple cider vinegar mixed into your water which can help make you less attractive to these pests.

4. Keep Cool and Dry

It may seem obvious, but not sweating will give you the best chance at not attracting black flies. Keeping your body cool and dry will not only make you more comfortable outside, but you will also reduce the chances of experiencing a painful bite.

5. Essential Oils

There are certain scents that pests simply hate including mint, peppermint, and lemongrass. Using these essential oils can help keep pests away and peppermint can also provide a bit of relief for a bug bite!

Use a Plant-Based Solution This Season

You can also stay bite-free while living your life the way you want to, wearing what you want and going out when you want. Just use a proven insect repellent, like Stay Away® Mosquitoes.

It’s not just for mosquitoes: made with picaridin, Stay Away Mosquitoes can repel other insects including biting flies (like black flies), ticks, and chiggers all day long. It’s naturally scent-free and super gentle on skin, meaning it’s safe for the whole family when used as directed–pregnant women and children included.

So get outside, enjoy nature, and tell the black flies and their pals to stay away.

Facts About Black Flies & How to Keep Them Away | EarthKind (2024)

FAQs

Facts About Black Flies & How to Keep Them Away | EarthKind? ›

Use insect repellent products, such as DEET and citronella oil to deter black flies. Re-apply repellents every few hours to maintain maximum effectiveness. Remember that smoke from punk sticks, campfires and tobacco products repel black flies.

How do you keep black flies away? ›

Use insect repellent products, such as DEET and citronella oil to deter black flies. Re-apply repellents every few hours to maintain maximum effectiveness. Remember that smoke from punk sticks, campfires and tobacco products repel black flies.

What is the best black fly killer? ›

Amdro Quick Kill Outdoor Insect Killer Ready to Spray and Amdro Quick Kill Outdoor Insect Killer Concentrate kill black flies by contact. Then they keep protecting against new black flies for up to three months. Treat lawns, trees, shrubs and flower gardens to reach adult black flies in their hiding places.

How long do black flies stay around? ›

Black flies are active spring through summer and bites are most common during spring. Wear a long-sleeved shirt, pants and a hat to avoid black fly bites.

How do I stop flies from biting me? ›

Cover up; clothing and gear treated with permethrin, such as Insect Shield, is a tested and proven defense against biting flies. Use insect repellent like DEET. Avoid swampy, muddy areas where biting flies lay eggs. Reduce vegetation and standing water around your home.

What kills black flies fast? ›

Combine equal parts of apple cider vinegar and water in a bowl. Add a few drops of dish soap to the mixture and stir well. Pour the solution into a spray bottle and spritz it on Black House Flies whenever you see them. The dish soap will break the surface tension of the fly's body.

What scent do flies hate? ›

Cinnamon – use cinnamon as an air freshner, as flies hate the smell! Lavender, eucalyptus, peppermint and lemongrass essential oils – Not only will spraying these oils around the house create a beautiful aroma, but they will also deter those pesky flies too.

Does anything repel black flies? ›

Vanilla extract, pine, or lavender oil repels biting black flies and mosquitoes too. Herbs like anise, basil, cedarwood, coriander, lemongrass, and mint may work to repel black flies and can be planted in flower boxes or pots and around the edges of your yard. Garlic plants are also reported to have a repelling effect.

Does vinegar get rid of black fly? ›

How do you get rid of tiny black flies (fungus gnats) in your home? To combat the tiny black flies living in my house plants and crawling over every windowsill, all it took was vinegar, soap and sugar.

What is a homemade biting black fly repellent? ›

Lemon eucalyptus oil

Dab some on clothing or add 10 to 15 drops to a cup of water in a bottle and spray the flies away. Other oils you can buy include sassafras, pennyroyal, lavender, eucalyptus, lemon balm and cedar. Notoriously itchy and achy, black fly bites are the pits.

Do black flies bite at night? ›

Black flies are active only during the day. They do not bite at night. Depending on weather, black flies tend to be more active at certain times of day. Activity peaks tend to occur around 9:00 to 11:00 AM and again from 4:00 to 7:00 in the late afternoon and early evening, or until the sun falls below the horizon.

Where do black flies sleep at night? ›

“As the day turns to dusk, flies take refuge under leaves and branches, on twigs and tree trunks, on the stems of tall grass and other plants,” Dr. Grimaldi said. “They typically will not overnight on the ground.

Why are black flies biting me? ›

They are closely related to mosquitoes. Female black flies suck blood in order to develop eggs. Males do not bite but feed on plant nectars. Female black flies range in size from an eighth to a quarter of an inch. The painful, itchy bite of the black fly is characterized by a reddened weal with a wound in the center.

Will Vicks Vapor Rub keep biting flies away? ›

Yes, just rub onto yourself to keep flies, mosquitoes and gnats away. Inside your home rub Vicks Vapor Rub on paper towels, use clip ONS to clip where you need.

What eats black flies? ›

“One of the good things about living in a cold climate is you short-circuit disease-vectoring by insects,” Donahue says. Blackflies are food for creatures we like. Trout eat their larvae. Birds and bats eat the adult flies.

What attracts black flies in the house? ›

Conditions that attract flies in and around homes include: Garbage cans left uncovered. Animal carcasses in the walls, attics, or elsewhere. Manure or pet feces around yards.

What is the best natural repellent for black flies? ›

Some recommended natural repellants include vanilla extract, lavender, and the extract from pine branches — just break open a young branch and rub the moisture from inside on your skin.

References

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