Turkey Gnat vs South American Robber Fly

Side-by-side species comparison

Attribute Turkey Gnat South American Robber Fly
Scientific Name Simulium meridionale Microstylum magnum
Order Diptera Diptera
Family Simuliidae Asilidae
Size 2-4 mm 30-40 mm
Habitat Farmland Grasslands
Diet Blood Feeders Predators
Regions North America South America, Central America
Conservation Least Concern Least Concern

Turkey Gnat

A black fly notorious for swarming livestock in the southern United States. Larvae attach to rocks in swift streams using silken pads and posterior hooks.

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Did You Know?

Massive swarms historically caused turkey and livestock deaths in the Mississippi Valley through blood loss and allergic reactions.

South American Robber Fly

A large, elongate robber fly from tropical regions with a slender abdomen and long spiny legs. It hunts from exposed perches and can catch large prey relative to its body size.

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Did You Know?

Some tropical Asilidae species are among the largest predatory flies in the world, rivaling small dragonflies in wingspan.