Wolf spiders (family Lycosidae) are among the fastest and most recognizable spiders in North America. If you have ever flipped a log or moved a pile of firewood and watched a large brown spider sprint for cover, you have almost certainly met one.
Average Wolf Spider Size
Most wolf spiders people encounter in gardens, basements, and crawl spaces measure between half an inch and 1.5 inches (12–38 mm) in body length. Including their legs, the biggest specimens can span 3 to 4 inches across — roughly the size of a human hand when fully extended.
The Largest Wolf Spider in the World
The Carolina wolf spider (Hogna carolinensis) is the largest wolf spider found in the United States. Adult females regularly reach a 1.4 inch body length and leg spans of 3 inches or more. Worldwide, some tropical species grow slightly larger, but the Carolina wolf spider remains the giant of the group in North America.
Males vs. Females
- Females are noticeably larger and bulkier than males
- Females carry egg sacs attached to their spinnerets and later carry dozens of spiderlings on their back
- Males are leaner, longer-legged, and more active hunters
How to Identify a Wolf Spider
- Stocky, hairy body in shades of brown, tan, or grey
- Two large forward-facing eyes plus six smaller eyes — a key identification feature
- Fast on the ground; they chase prey rather than spinning webs to catch it
- Often active at night and sometimes reflects flashlight beams with greenish eye shine
Are Wolf Spiders Dangerous?
Wolf spiders can bite if cornered or pressed against skin, but they are not medically significant. A bite usually produces mild pain and localized swelling similar to a bee sting. They are not aggressive and will almost always retreat when given space.
Identify Your Spider
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