Botfly - Information from Wikipedia on the family of flies, Oestridae, whose larvae live as parasites within the bodies of mammals. Human Bot Fly - Information from Wikipedia on Dermatobia hominis, whose larvae live as parasites within the bodies of humans and other primates. Dermatobia hominis - Several photographs of the warble fly, its larvae and puparium, with information on its life cycle. Click to enlarge. Gasterophilus nasalis - Several photographs of the stomach bot fly, its larvae and eggs, with information on its life cycle. Click to enlarge. Oestrus ovis - Several photographs of the sheep nasal bot fly, with information on its life cycle. Click to enlarge. Album: Oestridae - Photographs of several flies in this family. Family Oestridae - Photographs of flies in this family found in North America, provided by BugGuide. Cuterebra emasculator: Tree Squirrel Bot Fly - Provides photographs and a description of this obligate parasite of squirrels and chipmunks, its distribution, life cycle and impact on its hosts. Gasterophilus intestinalis: Horse Bot Fly - Provides photographs of different life stages and a description of this fly, its distribution, life cycle, veterinary and medical significance. Hypoderma lineatum: Cattle Grub - Provides photographs and a description of this parasitic fly, the warble, heel, bomb or gad fly, its distribution, life cycle, hosts, veterinary significance and management. Rodent and Rabbit Bot Flies - Photographs, description, life history and habits of species of Cuterebra.