The bite of a wolf spider is poisonous, but they are generally non-lethal. The spiders bite if they are provoked, and they are considered dangerous to humans.
Wolf spider bites are painful and require medical attention as soon as possible. Wolf spiders are 1/2 inch to 2 inches long. They are hairy, brown to gray in color and have various markings or lines on their backs. Wolf spiders do not spin webs to catch prey. They are night hunters that travel around looking for food. They live in silk-lined burrows and tend to move indoors when the weather gets cold. Wolf spiders can climb and swim, but they rarely do so unless they are stalking their prey. They can move rapidly when they are disturbed.