Why are Guenon Monkeys' Faces So Varied?
Guenons, a group of Old-World monkeys, have varied faces - some with eyebrow patches, some with nose-spots, some with beards. Why all this variation? It seems that these monkeys' faces can communicate who's who, and to what species they belong.Read the whole story on Zoologic: Monkey Faces Give Clues to Species and Individual Identity.