A close up shot of a wild northern Pig tailed Macaque picking lice eggs off its furry prehensile feet on a tree in a tropical forest in Khao Yai National Park Thailand, Asia

macaca pig tailed macaque primate macaque monkey sexual dimorphism prehensile feet cercopithecidae wildlife national geographic climber simiiformes conservation quadrupeds mammal mammalia animalia khao yai preening climb thailand species branch animal chordata nature asia haplorhini national park itchy balls leonina tree parasite habitat wilderness wild vulnerable natural forest picking lice tropical site northern southeast outdoors close up flea fur