Glacial Stonefly vs Flat-footed Scuttle Fly

Side-by-side species comparison

Attribute Glacial Stonefly Flat-footed Scuttle Fly
Scientific Name Leuctra alpina Metopina oligoneura
Order Plecoptera Diptera
Family Leuctridae Phoridae
Size 6-9 mm body length 1-2 mm
Habitat Mountains Woodlands
Diet Detritivores Detritivores
Regions Alps, Pyrenees Europe, Asia
Conservation Least Concern Least Concern

Glacial Stonefly

A small, slender stonefly found in the coldest alpine headwater streams. Its needle-like wings are rolled tightly around its body at rest.

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Did You Know?

Its rolled-wing resting posture gives the family its common name of needle flies.

Flat-footed Scuttle Fly

A minute brown phorid fly with broad flattened tarsi and reduced wing venation. It is associated with ant nests where it scavenges on refuse and dead ants.

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Did You Know?

It lives inside ant colonies as a tolerated guest, feeding on the waste materials that ants discard in their refuse chambers.