Hyenas make a variety of vocalizations, including wailing calls, howling screams and the well-known "laughter" used to alert other clan members up to three miles away of a food source.
Hyenas eat a great variety of animal products, vegetation and, according to campers, even aluminum pots and pans.
Lions (who will attack them at every opportunity), hunting dogs and strange hyenas are among the species that prey on hyenas. Hard to believe if you look at this photo taken at letaba river lodge
The spotted hyena is a skillful hunter but also a scavenger. Truly an opportunistic feeder, it selects the easiest and most attractive food it may ignore fresh carrion and bones if there is, for example, an abundance of vulnerable wildebeest calves. It consumes animals of various types and sizes (including domestic stock and even other hyenas), carrion, bones, vegetable matter and other animals' droppings. The powerful jaws and digestive tract of the hyena allow it to process and obtain nutrients from skin and bones. The only parts of prey not fully digested are hair, horns and hooves; these are regurgitated in the form of pellets. As hyenas hunt mostly at night and devour all parts, little evidence remains of their actual meals. Although they eat a lot of dry bones, they need little water.