Adult, Animal, Arboreal, Asia, Cercopithecidae, Colombo, Color Photograph, Day, Diyasaru Park, Endangered, Endangered Species, Endemic, Full Length, Horizontal, Langur, Mammal, Monkey, Nobody, Old World Monkey, One Animal, Outdoors, Primate, Purple-faced Langur, Side View, South Asia, Sri Lanka, Trachypithecus sp, Trachypithecus vetulus, Wildlife