These horn-eating insects are beetles in the Family Dermestidae and there's over 100 species. These are the black carpet beetles, buffalo carpet beetles, and various larder beetles. Most of the damage is done by the hairy larvae and they most enjoy eating dead, soft animal parts, cereal products, grains, rugs and carpets, upholstery, fur coats, mounted birds and mammals, and my archery turkey feathers. They were very persistent in trying to "break into" my extensive insect collection to eat the bodies of the dried, preserved insects. If I'm sure no dermestids are in my turkey feathers, I store the feathers in Zip-loc bags. Sometimes moth balls and Shell No-Pest strips work, but don't count on that being 100% effective. Constant and visual inspection (for dust left by the larvae) is necessary.
White-tail