About Cheiracanthium mildei L.Koch, 1864
Cheiracanthium mildei usually has a pale green or tan body, with darker brown palpi and chelicerae. Adult individuals typically reach a body length of 7–10 millimetres (0.3–0.4 in). Every leg ends in a double claw, and the front pair of legs is significantly longer, growing up to twice the length of the other legs. The eyes of this species have a tapetum lucidum that reflects light back toward the original light source when illuminated. Cheiracanthium mildei has a characteristic canoe-shaped tapetum that cannot form sharp images, so the exact benefit of this structure remains uncertain. It is possible that the tapetum helps the spider navigate by detecting the polarization of sky light. This species can bite humans, but any resulting effects are generally mild. Cheiracanthium mildei is native to a range extending from Europe and North Africa, through the Caucasus, to Central Asia. It has been introduced to the United States and parts of South America. It is widespread across the northeastern United States and eastern Canada, and it is found more often indoors than outdoors. It may have first been introduced from Europe to the Americas during colonial periods.
