Xysticus sp. “Ground Crab Spider” Thomisidae
National Bison Range, MT
June 8, 2014
Robert Niese
This large, highly variable genus of crab spiders can be found across the US and Canada. Although they are classified as ground spiders (as opposed to the flower crab spiders), they are often found in and around flowers where they wait to ambush arthropod prey.
Northwest Naturalist 