Dragonflying with Scott King is always entertaining. Scott is also aware of all of the other insects—like this Black Horsefly that we found at the Koester Prairie last Monday. This horsefly was a mind-boggling inch-and-a-half long.
Fortunately Black Horseflies do not usually bite people. It hurts like hell if they do. Perhaps worse, their bite can transmit bacterial, viral, and protozoan diseases—such as anthrax or Trypanosoma. These horseflies pose serious threats to livestock (Bugguide.net).