A Museum fly expert explains what is going on. Often large, persistent and painful, a bite from a horsefly is an experience unlikely to be forgotten. But why do horseflies seem to appear more in the ...

Medically reviewed by Jordana Haber Hazan, MD A horsefly bite, caused by a fly of the Tabanidae family, is painful but usually harmless, causing a raised, red area of skin known as a weal (much like a ...