Black flies, also called biting gnats, are common pests during the warmer months of the year. Immature black flies develop in stream and river habitats.
- Black Flies
About 30 species of black flies occur in Minnesota. Black flies, also referred to as gnats or buffalo gnats, can be a serious problem because of their ability to bite. University of Minnesota Extension Service. Attention: Non-MDH link
- Biting Gnat Control: Black Flies
Black flies do not transmit any diseases to humans in Minnesota but their bite can be quite painful and itchy. Metropolitan Mosquito Control District. Attention: Non-MDH link