Cheetah

A cheetah stretches and yawns in Kenya's Masai Mara in September 2015, front legs pushed out and back arched, the long, light frame of a sprinter on full display. The cheetah is the fastest land mammal and, unusually for a cat, it is active mainly by day. The quickest way to tell it from a leopard: solid black spots rather than rosettes, and the black tear lines that run from each eye to the corner of the mouth.