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Black Flies

Simuliidae

Black flies are tiny insects that love to live near water. They can be a bit annoying because they bite, but they are also important for nature!

Habitat: Wetlands

Appearance

The Black Flies has a distinctive humped back and short, stout legs. They are typically dark gray to black, with broad, clear wings that feature prominent veins. Their small size often makes them appear as tiny, dark specks.

KingdomAnimaliaPhylumArthropodaClassInsectaOrderDipteraFamilySimuliidae
Black Flies
Photo: United States Department of AgriculturePublic domain · Wikimedia CommonsView original ↗
social trait badgefilter feeder trait badgewetland trait badgecarnivorous trait badge
Black Flies

Category

Insects

Rarity

Common

Danger

2/5 · Low

Snaps

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Interesting facts

Black fly bites inject an anticoagulant, which is why their bites can be so itchy!

Female black flies must drink blood to get enough protein to lay their eggs.

Scientists study black fly larvae to check if rivers are healthy and clean.

Some black flies are called "buffalo gnats" because their humped back looks like a tiny buffalo!

Special abilities

Ability

Stream Anchors

Black Flies can anchor their larvae to rocks in fast-flowing rivers because of a silk pad and hooks on their rear, helping them stay put.

Ability

Underwater Breathers

Black Flies' pupae have special gill filaments that help them breathe underwater, allowing them to develop in oxygen-rich streams.

Ability

Silent Stalkers

Female Black Flies can locate their blood meal hosts using carbon dioxide and body heat, helping them find animals and humans for a bite.

Ability

Filter Feeders

Larval Black Flies build tiny silk nets to filter food particles from rushing water, helping them catch nutrients in challenging environments.

Measurements & details

Wingspan
2-10 mm
Size
1-5 mm
Lifespan
7-30 days
Flight Speed
8 km/h
Leg Count
6

Diet & Feeding

Adults drink nectar, but females often need blood to lay their eggs!

Age differences: Larvae filter-feed on microscopic organic matter in water; adults consume nectar, but females require blood for egg production.

Primary Foods

  • Nectar
  • Plant sap
  • Blood (females)
  • Algae (larvae)
  • Detritus (larvae)

Ecological connections

Traits

Also known as

No aliases listed yet.

Collections

Safety

Danger

2/5 · Low

If you see black flies, try not to swat at them. Just move away gently to avoid getting bitten.

Frequently Asked Questions

How to identify Black Flies?

Look for six legs, antennae, three body sections and the shape of the wings. Beetles have hardened front wings; flies have just one working pair. Tiny insects may need a close view before their group is clear. Insect Identifier: upload a photo and compare the visible details.

What is Black Flies's wingspan?

2-10 mm

How big is Black Flies?

1-5 mm

How long does Black Flies live?

7-30 days

How fast can Black Flies fly?

8 km/h

What does Black Flies eat?

Adults drink nectar, but females often need blood to lay their eggs!

Where is Black Flies usually found?

Wetlands

How many legs does Black Flies have?

6

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