Orthonevra brevicornis
Orthonevra brevicornis (Loew, 1843)
Biology & ecology:
The larva is aquatic, living in accumulations of decaying vegetation, especially in mesotrophic or base-rich seepages in fens, meadows and occasionally woods. Adults can be found in marshes and fens.
Distribution:
This scarce species is widely distributed in England, though possibly more frequent towards the south and east. There are scattered records from both Scotland and Wales.
Status & conservation:
The trends suggest that this species' occurrence has declined over the past 25 years, in keeping with many wetland species.
Recorded from 126 hectads since 1990.