The status of the Sumatran orang-utan Pongo abelii : an update

TLDR: The Sumatran orang-utan Pongo abelii is have recently caused local extinctions as mentioned in this paper and is classified as Critically Endangered on the 2002 IUCN Red List with other available information to provideRed List.

Abstract: The Sumatran orang-utan Pongo abelii is have recently caused local extinctions. We combinecategorized as Critically Endangered on the 2002 IUCN these results with other available information to provideRed List. Although several reports have suggested that a summary of the current distribution of P. abelii inthe species occurs in the region to the south of Lake Sumatra and, based on our surveys, previous populationToba in Sumatra, Indonesia, their distribution is poorly estimates, and estimates of losses, we speculate that onlyknown. In order to determine whether orang-utans still c . 3,500 orang-utans still occur in the wild in Sumatra atoccur in this region we surveyed areas in which orang- the end of 2002.utans have been reported as well as a number of otherforested areas. Orang-utan signs were found in only Keywords Indonesia, Lake Toba, orang-utan, Pongotwo areas. This indicates that habitat loss and hunting abelii , Primates, Sumatra.categorized on the 2002 IUCN Red List as EndangeredIntroductionand the Sumatran orang-utan as Critically EndangeredOrang-utans (