Hinged, touch-sensitive hairs on the legs help the spider to move freely about its terrain and are important in interactions ranging from mating to prey capture. Connected at their bases to sensory nerves, they provide spiders with the sensory experience and feedback needed to survive and function in their world. These hair and pit sensillae are especially associated with the spider's limbs and mouthparts. With a few notable exceptions, their sense of the world is obtained through specialised sensory hairs and pit-like sense organs in the cuticle. However, most spiders have very poor eyesight and many are active during the dark night hours. Unlike us, spiders use their hairs (which are often greatly modified) to perform an amazing variety of tasks - for sensing their world, in courtship displays, for moving around, and in defence and prey capture. Spider hairs are part of the hard outer cuticle (the spider's 'skin').
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