Angler's Curse Mayfly vs Pyrenean Snow Fly

Side-by-side species comparison

Attribute Angler's Curse Mayfly Pyrenean Snow Fly
Scientific Name Caenis rivulorum Chionea belgica
Order Ephemeroptera Diptera
Family Caenidae Limoniidae
Size 3-5 mm 3-4 mm body length
Habitat Rivers & Streams Mountains
Diet Detritivores Detritivores
Regions Europe Western Europe, Pyrenees, Belgium
Conservation Least Concern Data Deficient

Angler's Curse Mayfly

A tiny mayfly nicknamed for frustrating anglers who cannot imitate it on hook. Nymphs burrow in fine sediments of slow rivers and streams.

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Did You Know?

At just a few millimeters long, trout feed on them voraciously but anglers struggle to tie flies small enough to match.

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.