Fever Fly vs Mountain Midge

Side-by-side species comparison

Attribute Fever Fly Mountain Midge
Scientific Name Dilophus febrilis Deuterophlebia coloradensis
Order Diptera Diptera
Family Bibionidae Deuterophlebiidae
Size 5-7 mm 3-5 mm
Habitat Farmland Mountains
Diet Nectar Feeders Herbivores
Regions Europe, Asia North America
Conservation Least Concern Least Concern

Fever Fly

A small, shiny black march fly with spiny front tibiae used for digging. It was once believed to cause fevers in humans, hence its common name, though it is completely harmless.

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Did You Know?

Its spiny front legs are used by females to dig into soil for egg-laying, an unusual adaptation among flies.

Mountain Midge

A tiny midge whose larvae cling to rocks in fast-flowing alpine streams with suction discs.

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Did You Know?

Adults have bizarre fan-shaped wings that are useless for flight.