A Warble Fly is not seen too often, yet very conspicuous, as they are large, chunky and hairy. They can vary in color, either black, orange, or yellow. They kind of look like bees. They have white hairs on the underside of their head and thorax. Warble Flies lay their eggs in the forelegs of large mammals, by puncturing through the hide, they are considered parasitic to these animals. In deer or cows this can make their meat and milk damaged, as they can get infections from these flies. Warble Flies are found throughout North America. I found this one in a wetland area in northern Arizona.