Pups have been observed bouncing, in play, like little balls. Fennecs, like all foxes, mark territory with fecal piles and urine, dominant individuals urinating more than subordinates. There is a gland on the dorsal tail that is surrounded with black bristles and is of unknown function. It is not rubbed on sign-posts or used in any other obvious way. It may well serve in individual recognition and social bonding.
Vocalizations are many and varied.
Fennec vision, typical of predators is binocular and, typical of nocturnal animals, is enhanced by a reflective retina called a tapetum. The African savannah is hot, the rainforest of Asia is comfortably warm. The small, well-furred ears of Arctic animals won't freeze and fall off. Fennec feet are thickly furred between the pads, effectively insulating the feet from the hot sand. The fur also muffles the fox's footfall, allowing greater stealth when hunting.