They feed upon small insects, etc., and present no danger to humans. There are nearly 2,000 species worldwide. About 200 occur in North America. They are widely distributed in woody regions.
Many pseudoscorpions live among leaf litter on the forest floor.
Others prefer the areas under loose bark of dead and dying trees or among stones. Some live in intertidal areas among the rocks and vegetation. Some invade homes and may even be found among books and clothing in closets. Others occur in ant nests and beehives. Most are relatively resistant to desiccation.