Bluebottle Fly Calliphora vomitoria

The Bluebottle is a type of blowfly, the female laying her eggs in decomposing matter, especially meat, which the larvae (maggots) eat. The metallic blue abdomen gives the common name.

A large fly - size comparison with worker wasp and Greenbottle above, eating pear (adults eat nectar). The term "Blowfly" comes from meat being "fly blown" with eggs or maggots.

The blue abdomen isn't always apparent, sometimes it can look black - it depends on the light and the angle.