The White Tailed Spider has an elongated, dark grey abdomen with a white patch on the tip. An adult female may reach up to 20mm in length, males around 12mm. White-tailed spiders are found in cool dark areas such as under bark, leaf-litter, etc. Unlike the other two which are more often seen in a web, White- Tails can be found wandering in dwellings and may be encountered unexpectedly, and are most active at night. This wandering attribute probably explains why more than 60% of bite victims are bitten by white tails that have gotten into clothing, linen or the bed.