Perhaps you’ve seen a crab spider that perfectly matches a flower, waiting to ambush a pollinator. Ground crab spiders come in more subdued colors, like brown, black, and gray. These colors reflect where they live and hunt, generally on the ground on or under loose bark, in leaf litter, or under stones. Just like their flashier relatives, they seize passing arthropod prey with their two enlarged front legs. This pretty patterned species is native to northern Mexico to southern British Columbia; inland to Colorado.  
Photo by Leilani Coperhaven on 6/12/20 in Missoula, MT.