Lives in sandy arid and desert environments. BEHAVIOR

Generally nocturnal creature, however still active during day (but avoiding direct sunlight). During day, spends most time hiding in burrows or under objects looking for shade. Able to run very fast, up to 20 in (50 cm) per second for short periods of time, though unable to sustain this pace for long periods. Considered one of the fastest arthropods. Uses rear three pairs of legs to run, and uses first pair for sensory purposes (as "feelers" to detect and pull prey into its large oversized jaws). Constructs extensive, shallow burrows under bushes and buildings by utilizing chelicerae, pedipalpi, and metatarsal and tibial rakes of second and third pairs of legs. Burrows are used for mating, defense, and shelter. Can stridulate (make a noise) by rubbing together pair of horny ridges on insides of chelicerae.

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