Wolf spiders typically roam alone in the night, stalking prey. They eat mostly ground-dwelling insects, such as crickets, as well as other spiders. Large females may take on small amphibians and reptiles, such as frogs and lizards, according to BioKids. Some species chase down and seize their prey, while others wait for prey to walk by and then ambush it. Wolf spiders often jump on their prey, hold it between their legs and roll over on their backs, trapping their prey with their limbs before biting it and injecting their venom.