Brown Recluse Spider
Adult brown recluse spiders range from tan to dark brown, and they have six eyes in three groups of two. These spiders could bite and inject venom that requires a trip to the emergency room. The venom might cause dead tissue and may require plastic surgery, in some cases, Campbell says. Not all brown recluse spiders result in ulcer formation, and other spider bites might cause a similar reaction, too.
How to protect yourself: Preventing brown recluse spiders from entering your home is the main way to avoid bites, per Campbell. Seal any small openings or holes in your house to keep them out. Wear protective clothing and gloves when moving firewood, since spiders like to hide in stacked wood. Try not to leave clothes and shoes on the floor and shake them out before wearing, especially if you store them in the basement, garage, or other dark areas.