Horseflies

Horseflies have black or gray bodies with large eyes that have green or purple horizontal stripes. You don’t have to worry about male horseflies, but the females do bite. Female bites are especially painful because horseflies tear and lap at the skin. Some species spread disease, but that usually only involves livestock, according to Campbell.

How to protect yourself: During outside activity, Campbell recommends wearing light-colored clothing and insect repellent to prevent horsefly bites.