The cheetah (Acinonyx jubatus) is a big cat in the subfamily Felinae that inhabits most of Africa and parts of Iran. It is the only extant member of the genus Acinonyx. The cheetah can run as fast as , faster than any other land animal. It covers distances up to in short bursts, and can accelerate from in three seconds. The cheetah's closest extant relatives are the puma and jaguarundi of the Americas. Cheetahs are notable for adaptations in the paws as they are one of the few felids with only semi-retractable claws.