Is this a bit fly

Asked November 11, 2020, 11:40 PM EST

This came out through the side of a dead mouse. It is almost as big as the mouse. The size made me doubt it it was a bot fly. What do you think?

Linn County Oregon

1 Response

Yes, the object appears to be a bot fly. Well, more accurately, it is the pupa from which an adult bot fly will emerge.

The attached image provides an example from "Rodent and Rabbit Bot Flies"
(You should be able to read the article from Colorado State University if you use the publication title as your search phrase.)