Ants are common throughout the world in many different ecosystems. More than 450 species of ants live in North America. They are also one of the most common pests in human environments and dwellings. In human environments, they build nests in soil, open lawns, under concrete slabs, stones or boards, adjacent to foundation walls, in the walls of houses, in decaying wood, or in cavity spaces associated with debris. Some nests are relatively permanent while others last for a short period of time. Less than 50 species have been known to invade homes across the United States, and only about 10 of these commonly enter homes in Missouri.
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