African monkeys mate outside their species, create hybrids
A US-based study has discovered that two genetically distinct species of guenon monkeys inhabiting a park in Tanzania have been mating and producing hybrid offspring for several years. Researcher Kate Detwiler examined monkey poop and found gene flow from "red-tailed" monkeys to "blue" monkeys. The "promiscuity" has made 15% of the population as hybrids, which is very unusual, said Detwiler.