Horsefly

Horseflies are a family of true flies that survived the Great War.

Background
After the Great War, a portion of the Tabanus genus split into two species: some remained unaltered horseflies, while others grew larger and more aggressive, forming the wasteland's bloatflies. As unsanitary as it is, unaltered horsefly maggots have been used by a twin duo in Klamath to tenderize some questionably safe brahmin jerky.

Appearances
Horseflies are mentioned in Fallout 2 and Fallout 3.