Zebras are equids, long-lived animals that move quickly for their large size and have teeth built for grinding and cropping grass. Zebras have horse-like bodies, but their manes are made of short, erect hair, their tails are tufted at the tip and their coats are striped. Three species of Zebra still occur in Africa, two of which are found in East Africa. The most numerous and widespread species in the east is Burchell's, also known as the common or plains zebra. The Burchell's Zebra is built like a stocky pony. Its coat pattern can vary greatly in number and width of stripes. The stripes are a form of disruptive coloration which breaks up the outline of the body. At dawn or in the evening, when their predators are most active, zebras look indistinct and may confuse predators by distorting distance. Their shiny coats dissipate over 70% of incoming heat.