black and golden east javan langur trachypithecus auratus on tree branch

adult animal asia asian auratus black branch brown brownish colobinae colobine colobines color coloration colour colouration east ebony enclosure exhibit female glossy gold golden indonesia indonesian island islands java javan jungle juvenile known langur legs long lutung male mammal monkey morph old orange primate rare sideburns sides singapore southeast subfamily tail tinge trachypithecus tree tropical vulnerable world zoo