Taxonomy, geographic variation, and population genetics of Bornean and Sumatran orangutans / Benoît Goossens ... [et al.] -- The functional significance of variation in jaw form in orangutans / Andrea ...
Researchers have confirmed that the critically endangered Tapanuli orangutan, previously thought to live only in Sumatra’s Batang Toru forest, also inhabits a peat swamp forest 32 kilometers (20 miles ...