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Instead of hemoglobin, the wolf spider’s circulatory system uses hemolymph, a respiratory protein.

This type of circulatory system doesn’t deliver blood to the organs and internal tissues through blood vessels. Wolf spiders have an open circulatory system. Wolf spiders have palps located near the jaw that act as sensory structures and double for the male’s sperm storage. The chelicerae contain two very sharp fangs that are positioned horizontally at the bottom of the jaws. Once the toxin has taken effect, wolf spiders use their jaws to eat. They use their jaws to capture and hold prey while injecting them with venom. Wolf spiders’ jaws, or chelicerae, have several purposes. They quickly attack prey, while other spiders like the brown recluse spider typically hide in dark, undisturbed areas. They are often spotted scurrying across open ground. Appropriately, their behavioral traits can help identify wolf spiders. Wolf spiders are often mistaken for other species of spiders such as nursery web spiders, brown recluse spiders, fishing spiders, and even tarantulas. There are around 200 species of wolf spiders belonging to the Family Lycosidae throughout the United States and Canada. Unlike other spider species that are ambush hunters that build webs and lay in wait for an unsuspecting critter to become a meal, wolf spiders are swift runners and chase down their prey, much like a wolf does. Do Wolf Spiders Bite and Are They Poisonous?Ī wolf spider is a relatively large and hairy arachnid that has been named by how it hunts its prey.