Forestfly vs Horn-faced Marsh Fly

Side-by-side species comparison

Attribute Forestfly Horn-faced Marsh Fly
Scientific Name Nemoura cambrica Dictya umbrarum
Order Plecoptera Diptera
Family Nemouridae Sciomyzidae
Size 6-9 mm 4-7 mm
Habitat Forests Wetlands
Diet Detritivores Detritivores
Regions Europe North America
Conservation Least Concern Least Concern

Forestfly

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

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Did You Know?

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

Horn-faced Marsh Fly

A small yellowish marsh fly with patterned wings and prominent facial ridges. Larvae feed on decomposing aquatic snails in shallow wetland habitats.

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Did You Know?

Sciomyzid flies are the only family of Diptera in which the larvae are obligate associates of mollusks.