Baboons (comes from "babouin", the name given by the French naturalist Buffon) belong to any five species of robust, large, and primarily terrestrial (ground dwelling primate) monkeys found in open savannah, open woodland and hills across the dry regions of Africa and Arabia. Olive baboon and the yellow baboon are two common types of baboons found in Uganda, west and central Kenya and northern Tanzania. Chacma baboon (papio ursinus) is the male largest species, average 30kg (66 pounds), but females from the same species are only half of this size. The Hamadryas, or sacred baboon (P.hamadryas) is the smallest species, average 17kg, and the females weight in 10kg. Generally, baboons range from 50 to 115cm in length, without including their 45 to 70cm long tails. All species have long snouts with the nostrils situated at the end, close-set eyes, rough spots on their protruding hindquarters called ischial callosities, short tails, heavy powerful jaws, and male baboons even have long dagger-like canine teeth. Baboons have known to live up to 45 years. They can survive for long periods by licking the night dew from their fur.