The glossy, black-bodied female black widow spider has distinctive red spots on the underside of the abdomen. Only the female can inflict a potentially dangerous bite. The small, seldom-seen male is harmless.
The bold jumper, or white-spotted jumping spider, is fuzzy, makes jerky movements, jumps surprisingly long distances, and doesn't build webs. It usually has a black body with white, orange, or reddish spots on the abdomen.
The filmy dome spider is one of the most abundant woodland spiders in Missouri. Although the spider is tiny, its snare web, which looks like an upside-down silk bowl, is conspicuous throughout the year.
Missouri has several species of ground crab spiders in the genus Xysticus. They are usually dull gray or brown with brown, white, or yellow markings. They typically live under bark or on the ground in leaf litter.