About Callobius severus (Simon, 1884)
Callobius severus is a species of spider found in parts of the United States and Canada. Adult individuals grow to roughly 19 mm (3⁄4 inch) in total size, and males are usually smaller than females. The spider’s cephalothorax and legs range in color from reddish to dark brown. Its abdomen is covered in fine hairs, and ranges in color from dark to light grey, often marked with large, symmetrically mirrored paler spots across its surface. Mature males have large, extended palps that bear noticeable prominent projections. This is a woodland nesting species, and it is commonly encountered in the Pacific Northwest. It is one of the most widespread and frequently found spiders in populated areas of Washington state. It often builds thin funnel webs inside houses and other man-made structures, as long as the available space has not already been occupied by another organism. This species is not dangerous to humans or pets, though its bite is painful, just like bites from other species in the Callobius genus.
