Photographer joelsartore records an endangered gray woolly monkey named Prince William at Brazil's Mantenedor da Fauna Silvestre Cariuá. High up in the treetops of cloud forests, these primates spend much of their day traveling in search of food, using their long, prehensile tails to bridge gaps between trees. Follow joelsartore to see more creatures featured in the Photo Ark. #PrinceWilliam #monkey #primate #animal #endangered #cute #PhotoArk