Gasterophilus pecorum

Gasterophilus pecorum is a species of botfly within the genus Gasterophilus that is an obligate parasite of horses and other equids.

Gasterophilus pecorum is found in the desert steppe of Xinjiang, China, where it is the most prevalent botfly species. In Kalamaili Nature Reserve (KNR), China, G. pecorum is a major problem for the health of Przewalski's horse, which has been reintroduced in the area. Gasterophilus pecorum has also been observed infecting equids, such as the Persian Onager (Equus hemionus onager). Of the six identified species of Gasterophilus found within the KNR, G. pecorum is responsible for a majority of all botfly infections.