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The Old World monkeys or Cercopithecidae are a group of primates, falling in the superfamily...

The Old World monkeys or Cercopithecidae are a group of primates, falling in the superfamily Cercopithecoidea in the clade Catarrhini. The Old World monkeys are native to Africa and Asia today, inhabiting a range of environments from tropical rain forest to savanna, scrubland, and mountainous terrain, and are also known from Europe in the fossil record. However, a (possibly introduced) free-roaming group of monkeys still survives in Gibraltar (Europe) to this day. Old World monkeys include many of the most familiar species of non-human primates such as baboons and macaques. Old World monkeys are medium to large in size, and range from arboreal forms, such as the colobus monkeys, to fully terrestrial forms, such as the baboons. The smallest is the Talapoin, with a head and body 34-37 cm in length, and weighing between 0.7 and 1.3 kilograms, while the largest is the male Mandrill (the females of the species being significantly smaller), at around 70 cm in length, and weighing up to 50 kilograms. From the point of view of superficial appearance, Old World monkeys are unlike apes in that most have tails (the family name means "tailed ape"), and unlike the New World monkeys in that