Howler Monkey scratches self while resting with troop in treetop, Tambopata National Reserve, Peru

howler monkey treetop primate amazon basin wildlife branch canopy tambopata national reserve grooming monkey brown jungle tree southern hemisphere peru nature south america amazonian animal rainforest environment wild scratch foliage midday forest troop exotic leaf top rest natural sleep sunlight high behavior nap 4k warm madre de dios tropical outdoors balance cute breeze fur heat funny