Tree Squirrel Bot Fly, Cuterebra emasculator Fitch (Insecta: Diptera: Oestridae)

The Featured Creatures collection provides in-depth profiles of insects, nematodes, arachnids and other organisms relevant to Florida. These profiles are intended for the use of interested laypersons with some knowledge of biology as well as academic audiences. This document provides an in-depth profile of the tree squirrel bot fly, Cuterebra emasculator Fitch, detailing its taxonomy, distribution, physical characteristics, life cycle, host range, and impact on hosts. The bot fly is an obligate parasite of tree squirrels and chipmunks in eastern North America, causing noticeable swellings known as warbles. The document also discusses the bot fly's behavior, infestation symptoms, and treatment options, emphasizing its role in the ecosystem and interactions with humans. Original publication date November 2007.