Anthomyia

Anthomyia is a genus of flies in the family Anthomyiidae.

[1] They look rather like small houseflies, but commonly have conspicuous black-and-white patterning.

[2] This appears to be a mild form of aposematic coloration, though they do not appear to be distasteful unless they have eaten something offensive to the predator and have loaded their guts with it.

[citation needed]

This article related to members of the muscoid flies is a stub.

Specimen from wild pigeon's nest
Anthomyia procellaris laying eggs into faeces on a stump of tree