Pyrenean Snow Fly vs Green Stonefly

Side-by-side species comparison

Attribute Pyrenean Snow Fly Green Stonefly
Scientific Name Chionea belgica Alloperla caudata
Order Diptera Plecoptera
Family Limoniidae Chloroperlidae
Size 3-4 mm body length 8-12 mm
Habitat Mountains Mountains
Diet Detritivores Detritivores
Regions Western Europe, Pyrenees, Belgium North America
Conservation Data Deficient Least Concern

Pyrenean Snow Fly

A rare wingless crane fly found on snow in the mountains of western Europe. It is smaller and darker than related snow fly species.

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Did You Know?

It was first described from specimens collected in Belgium, giving it its name.

Green Stonefly

A small bright green stonefly found along clean mountain streams in North America. Despite its small size, it is an important indicator of excellent water quality.

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Did You Know?

The presence of green stoneflies in a stream is considered strong evidence of pristine water quality by aquatic biologists.