Spiders in the family Philodromidae are commonly known as running crab spiders, after their speed and the fact they run sideways, like their seafood counterparts. One distinguishing characteristic of the running crab spiders is their legs: unlike crab spiders in the family Thomisidae, the Philodromids' second set of legs are the longest. These spiders are often found indoors, living in the corners of ceilings and walls. However, these spiders do not build webs - the cobwebs in the picture below are the product of another spider, the cobweb spider Steatoda. Running crab spiders hunt prey as do jumping spiders and do not rely on webs to capture food.