Sialis lutaria

Sialis lutaria

Observation - Sialis lutaria. Description: Around a pond on heathland, lutaria would be the expected species. It's easy enough to turn the fly upside down in the net and photo the genitalia from below, to prove that.

Around a pond on heathland, lutaria would be the expected species. It's easy enough to turn the fly upside down in the net and photo the genitalia from below, to prove that.