"warble fly." YourDictionary, n.d. Web. 12 October 2018. <http://www.yourdictionary.com/warble-fly>.
warble fly. (n.d.). Retrieved October 12th, 2018, from http://www.yourdictionary.com/warble-fly
Any of several large hairy flies of the family Oestridae, especially of the genus Hypoderma, whose eggs, which are laid on the lower body and legs of cattle and certain other mammals, hatch into larvae that form warbles under the skin. Also called heel fly .