A deer fly trap is a trap that attracts deer flies using some form of bait. In most cases, the flies are attracted by the trap's motion, color and size. The trap is covered by a sticky material that captures flies as they land on it.
There are commercial and homemade deer fly traps that are able to capture deer flies and reduce their number in any area. Deer flies have keen vision, which they use to detect the motion of their prey. They are also among the fastest fliers in the insect world, allowing them to catch fast-moving prey easily.