east javan langur - trachypitheus auratus in its natural habitat

east javan langur trachypitheus auratus ebony lutung budeng cercopithecoidea old world monkey cercopithecidae colobinae presbytini langurs trachypithecus primatology monkeys ape animalia fauna animals biology primates zoology nature mammal species natural wildlife forest wild rainforest tropical ecology jungle polymorphism treedwellers herbivores ecosystem climate change biodiversity environmental conversation asia indonesia java people endangered habitat primate family widespread