Semaphore Fly

Poecilobothrus nobilitatus


Body length 7mm. The thorax is shiny, metallic green and the male has shaded wings with white tips.


Normally found close to muddy pools, on the surrounding vegetation or actually on the mud. The adults are predators of other small flies and the larvae feed on small invertebrates in the mud.

Status and distribution

Mainly restricted to the southern half of Britain, where it can be fairly common, but much rarer further north. Fairly common in Nottinghamshire, can be common at Netherfield Lagoons in some years.

Best time to see

May to August.