Banded Blackfly vs Common Bat Fly

Side-by-side species comparison

Attribute Banded Blackfly Common Bat Fly
Scientific Name Simulium ornatum Basilia nana
Order Diptera Diptera
Family Simuliidae Nycteribiidae
Size 2-4 mm 2-3 mm
Habitat Rivers & Streams Caves
Diet Herbivores Blood Feeders
Regions Europe Europe
Conservation Least Concern Least Concern

Banded Blackfly

A widespread European black fly species complex found in diverse stream types. Larvae filter-feed from silken pads attached to trailing vegetation and stones.

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Did You Know?

Recent DNA studies revealed that what was considered one species is actually a complex of several cryptic species.

Common Bat Fly

A tiny, completely wingless spider-like fly that parasitizes bats. Its body is so highly modified for ectoparasitism that it bears almost no resemblance to a typical fly.

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Did You Know?

It has evolved to be so specialized that its head folds back over the thorax, and it walks like a spider through bat fur.