Rhinopithecus avunculus Tonkin snub nosed monkey (Rhinopithecus avunculus) «Rhinopithecus avunculus» Tonkin snub nosed monkey (Rhinopithecus avunculus) Rhinopithecus avunculus Tonkinstompneusaap op de IUCN Red List of Threatened Species Tonkin snub nosed monkey (Rhinopithecus avunculus) «Rhinopithecus avunculus» "Rhinopithecus avunculus" IUCN IUCN Rhinopithecus avunculus IUCN