Deer and Horse Flies
Of course, these flies get the name because they like to feed on deer and horses. They inhabit most of the U.S. usually around water and livestock. Deer flies can feed off many different mammals including humans. Adults can reach large sizes up to an inch long. Eggs can be laid in numbers ranging from 100-1000. Deer flies can carry disease including tularemia that is transmitted from rabbits and other rodents. It is thought that they can travel for over 30 miles to a feeding site.
Control is not practical but humans can wear protective clothing or netting if they are a huge problem. Repellants can be used to keep flies from landing on skin and clothing. Proper screens can be used to keep flies from entering homes and porches