You flip on the garage light and a brown spider freezes on the wall. Wolf spider or brown recluse? In Oklahoma both are around, and the answer changes how worried you should be. The good news is that once you know what to look at, the two are not that hard to separate. Size, the markings, the legs, and how the spider acts each give it away.
Quick answer
A wolf spider is large, hairy, and fast, with stripes or mottling on its legs and a body roughly the size of a quarter or bigger. A brown recluse is small (about the size of a penny including legs), light tan, smooth-legged, and carries a dark violin-shaped mark behind its head. The wolf spider is essentially harmless. The brown recluse is venomous and worth caution.
Dealing with this right now?
Think you've got brown recluses hiding in the house? Don't guess. Schedule an inspection with Acenitec and we'll find their hiding spots and treat them. Serving Oklahoma City since 1947.
See how our general pest control service works around the OKC metro.
Start With Size and Build
Size is the fastest tell. Wolf spiders are big and chunky. A full-grown one can span a couple of inches across the legs, with a thick, hairy body that looks heavy. People often describe them as scary-large.
Brown recluses are small and slight. Legs included, an adult is roughly the size of a penny, and the body is slim and delicate by comparison. If the spider is large, bulky, and noticeably hairy, you are almost certainly looking at a wolf spider, not a recluse.
Look for the Violin Mark and Color
The brown recluse earns its fiddleback nickname from a dark, violin-shaped mark on the top of its front body section, with the neck of the violin pointing back toward the abdomen. The overall color is an even tan to light brown with no other patterning. It looks plain and uniform.
Wolf spiders are darker and busier. They tend to be a mix of brown, gray, and black with stripes or mottled patterns running down the body and legs. If you see banding or a camo-like pattern, that is a wolf spider. A recluse is one solid color with only the single violin mark to break it up.
- Brown recluse: even tan body, smooth, single dark violin mark behind the head
- Wolf spider: darker, mottled or striped brown, gray, and black patterning
- Recluse legs are uniform with no spines; wolf spider legs are visibly hairy and patterned
The Legs and Eyes Settle It
Get a closer look at the legs (from a safe distance) and the difference is clear. A brown recluse has thin, smooth legs all the same color, no stripes and no obvious spines. A wolf spider has thick, bristly, patterned legs built for chasing prey across the ground.
Eyes give a definitive answer if you can manage a magnified photo. Most spiders have eight eyes. The brown recluse has six, arranged in three pairs forming a small semicircle. A wolf spider has eight eyes in a distinctive layout, including two large eyes that often shine back at a flashlight. If you count six eyes in pairs, it's a recluse.
Behavior Tells You a Lot
These two spiders live very differently. Wolf spiders are out in the open, hunting on the move. One will sprint across the floor when you disturb it. They are active, fast, and visible, which is exactly why they startle people so often on a warm Oklahoma evening.
Brown recluses hide. They tuck into boxes, closets, shoes, attics, and the backs of cluttered shelves, and they avoid the open. You rarely see one running across the floor in plain view. If a brown spider is sprinting around in the open, the behavior points to a wolf spider. A recluse found indoors is usually disturbed from a hiding spot when you move a box or shake out clothing.
What to Do With Each One
A wolf spider can be escorted out with a cup and a piece of paper, or simply left alone, since it is eating other insects. It is not a medical threat to most people.
Treat a suspected brown recluse with respect. Don't handle it. A recluse bite can cause a slow-healing wound and is worth a doctor's visit, so if you think one bit you, get medical care. One recluse usually signals more in the quiet corners of the house. Shake out shoes and stored clothing, clear clutter where they hide, and if you keep finding them, bring in a pro. Recluses tuck into spots a can of store spray never reaches.