Do black flies bite humans? YES! Black flies are largely attracted to the carbon dioxide we exhale, as well as, dark clothing, perfumes, and sweat. Not only do they bite, but they also suck blood as a necessary part of their reproduction process. Female black flies NEED blood from human and animal prey and will travel up to 10 miles to get it! Persistent little fuckers!
While they do not transmit diseases to humans in the United States, they can cause swelling, bleeding, and in some cases, an allergic reaction, blood loss, or death.
Knowing what these little bloodsuckers like and their natural habits can help you avoid drawing them in and make it less likely for you to be bitten. They are most active from Spring to Summer. Since they tend to attack areas of tight-fitting clothing and the head, wearing loose, long-sleeved shirts, pants, hats, and using an effective insect repellent (BALLISTIC) can help reduce the chance of becoming a black fly victim!