Deer Botfly

The name deer botfly (also deer nose bot) refers to any species in the genus Cephenemyia, within the family Oestridae. They are large, gray-brown flies, often very accurate mimics of bumblebees. They attack chiefly the nostrils and pharyngeal cavity of members of the deer family. The larva of Cephenemyia auribarbis, infesting the stag, is called a stagworm. The genus name, also spelled Cephenomyia, comes from the Greek kēphēn, drone bee, and myia, fly.