Colors and pattern are proven to lure biting flies! The Rescue TrapStik® for Biting Flies catches a variety of flies that feed on blood including horse flies, black flies, stable flies, black flies, and deer flies. This trap will also catch common house flies and nuisance flies! Rescue! TrapStik® for Biting Flies uses new TrapStik® technology to lure flies with appealing colors and a multi-dimensional pattern. Flies are attracted by the colors and patterns on the TrapStik®, then get stuck to the adhesive surface. Traps are odor-free, pesticide-free, have a large catch surface and the adhesive holds up in the heat.