By eHow Home & Garden Editor
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Female deer flies feed on the blood of mammals. They are vicious biters with a very painful bite. Using razor like portions of their mouths, they cut through the skin and then suck the blood for several minutes. Bites from deer fly can also transmit diseases such as anthrax, anaplasmosis, hog cholera, and others. Deer flies are most abundant on bright, sunny days that have little wind.
eHow Home & Garden Editor