Typically black with a pattern of spots and striped on their abdomen and legs. Often these spots are orange-tinted in juveniles, turning white as the spider matures. These spiders have been known to jump up to 50 times their own body length by suddenly increasing the blood pressure in the third or fourth pair of legs. The male may jump away during mating if the female approaches too quickly. Like other jumping spiders, due to their large, forward facing eyes, they have very good stereoscopic vision. This aids them when stalking prey, and allows some visual communication with others of their species, such as courting 'dances'.
Like most jumping spiders, P. audax tends to prefer relatively open areas to hunt in, as they actively seek and stalk prey and do not build webs to catch food. They are common in fields and grasslands, but are frequently seen on fences, exterior walls, and gardens as well. Many jumping spiders seem to prefer flat vertical surfaces, likely due to the fact that it enables them to spot and chase down roaming insects with ease.