Vervet Monkeys (Chlorocebus pygerythrus) sitting on wall, mother with young, Kenya

Vervet Monkeys (Chlorocebus pygerythrus) sitting on garden wall at dusk, Kenya

Young baboon follows adult through water, amusing; with audio, Kenya

Howler Monkey (Alouattinae) in tree, turns back on camera, medium close up.

Howler Monkey (Alouatta) in tree scratching and howling, close up.

Justin Kirk, Crystal the Monkey at 2012 Teen Choice Awards on 7/22/12 in Los Angeles, CA (Footage by WireImage Video/Getty Images Entertainment Video)

eastern cape

Black Macaques mating, Sulawesi, Indonesia

Indecisive young baboon; with audio, Kenya

White gibbon eating grass (HD.)

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Howler Monkey (Alouatta) in tree, howling.

White-faced Capuchin Monkey (Cebus)climbs branches of Dipteryx tree, wide angle.

Howler Monkey (Alouatta), climbs to windy tree top, wide angle

White-faced Capuchin Monkey (Alouatta), climbing branches of tree, wide angle

CU Two macaques next to river, cuddle together for warmth