Body length 7 to 8mm. This blowfly is a light metallic blue on the thorax and abdomen. The thorax has some short dark stripes and the forward edge is dusted white. The head is white with red eyes. The male has a wider more flattened shape than the female which is greener than the male.
A wide range of habitats are used, the females laying their eggs in bird nests (normally of Passerines) so that the larvae can attach themselves to the nestlings and suck their blood.
Status and distribution
Widespread and fairly frequent in England and Wales, less so in Scotland. Fairly common in Nottinghamshire and recorded once at Netherfield Lagoons.
Best time to see
April to September.