Dominant male proboscis monkey (Nasalis larvatus) on the lookout for challenges from younger males in the bachelor group, Labuk Bay Proboscis Monkey Sanctuary, Sabah, Borneo, Malaysia, Southeast Asia, Asia

outdoors outside day horizontal nobody no one colour color colour image color image dominant male male animal proboscis monkey nasalis larvatus nose labuk bay proboscis monkey sanctuary sabah borneo malaysia southeast asia asia asian travel travel destination nature natural animal themes animal animals one animal animal portrait close up mammal monkey primate anatomy aggression animal behaviour adult animal tree photography