Science Monkeys evolved distinct faces to prevent interbreeding, say scientists

The distinctive facial characteristics of the more than 20 guenon monkey species evolved out of an attempt to prevent one species from inadvertently mating with another, say scientists.

By , LiveScience Senior Writer

William Allen

With bushy beards and funky blue, yellow or brown faces, guenon monkeys have some of the most colorful and quirky faces of all primates. A close study of more than 20 guenon monkey species reveals these sociable animals may rely on their distinctive patterns to prevent interbreeding.