Two individuals sitting on a branch while the other turns around to look, Dusky Leaf Monkey Trachypithecus obscurus, Thailand

spectacled leaf monkey dusky leaf monkey trachypithecus obscurus langur spectacled langur lutung trachypithecus primates simiiformes monkeys wildlife sanctuary primate malaysia fruiting tree cercopithecidae long tail foraging apes mammals wildlife habitat kaeng krachan arboreal thailand animals mammalia branches myanmar canopy endangered jungle mongkeys rainforest habitat loss climbing trees endangered species nature haplorhini forest leaves folivorous national parks natural morning green howling