The blue bottle fly or bottlebee (Calliphora vomitoria) is a common blow-fly found in most areas of the world and is the type species

Type species

In biological nomenclature, a type species is both a concept and a practical system which is used in the classification and nomenclature of animals and plants. The value of a "type species" lies in the fact that it makes clear what is meant by a particular genus name. A type species is the species...

 for the genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 Calliphora

Calliphora

Calliphora is the type genus of blow flies, the family Calliphoridae.-Species in the genus Calliphora:...

.
It is 10–14 mm (0.393700787401575–0.551181102362205 ) long, slightly larger than a housefly

Housefly

The housefly , Musca domestica, is a fly of the suborder Cyclorrhapha...

. The head and thorax are dull gray and the abdomen is bright metallic blue with black markings. Its body and legs are covered with black bristle-like hair.