Extinct Primate Linda talks with Scott McGraw, a physical anthropologist, about the extinction of a monkey called Miss Waldron's Red Colobus, whose native habitat is West Africa. The last documented sighting of the red colobus was 20 years ago. McGraw says the monkey was hunted and eaten which is one reason for its decline. Also, there is so little of the West African rain forest left, that there's not enough habitat to support the red colobus. McGraw is an assistant professor of anthropology at Ohio State University. He specializes in West African monkeys.