WHAT ARE HORSE FLIES & DEER FLIES?
Horse flies and deer flies are large flies known for their painful bites, and belong to the family Tabanidae. Most horse flies and deer flies are at least as large as house flies, and generally have a similar shape as house flies. Horse flies and deer flies can be distinguished from house flies and other flies by their unusual antennae (shown below): all horse flies and deer flies have 3 antennal segments, with the 3rd segment long and conspicuous. Like all flies, horse flies and deer flies have only one pair of wings and have mouthparts adapted for sucking.
