A Species of Rove Beetle (faimly Staphylinidae, possibly in the genusPlatydracus):  There are over 4,100 species in this large family of beetles. Most of them are predators, many of which are beneficial predators of pest insect species. They can range in length from about one-eighth of an inch to nearly an inch. Adult rove beetles can often be found on animal carcasses where they eat the other insects feeding on the carcass. Although they have wings and can fly, they usually prefer to run along the ground. Photo by Angie Wild on 5/12/18 in Missoula, MT.