Large Spring Stonefly vs Forestfly

Side-by-side species comparison

Attribute Large Spring Stonefly Forestfly
Scientific Name Dinocras cephalotes Nemoura cambrica
Order Plecoptera Plecoptera
Family Perlidae Nemouridae
Size 20-35 mm 6-9 mm
Habitat Rivers & Streams Forests
Diet Predators Detritivores
Regions Europe Europe
Conservation Least Concern Least Concern

Large Spring Stonefly

One of the largest European stoneflies with a distinctively broad, flattened head. Nymphs are apex invertebrate predators in upland streams.

💡

Did You Know?

Despite their large wings, adults are poor fliers and prefer to run along streamside rocks.

Forestfly

A small brown stonefly associated with forested Welsh and British streams. Nymphs have distinctive cervical gills and feed on leaf detritus.

💡

Did You Know?

The species was first described from specimens collected in Wales, giving it the name cambrica.