Orang-utans in Sumatra

Abstract

In 1971 John MacKinnon spent seven months in Sumatra studying orang-utans in the wild. This report compares his findings with those of his earlier and much longer study in Sabah, the report of which was published in Oryx September 1971, and also comments on some other mammals in his study area, including the Sumatran rhino. © 1973, Fauna and Flora International. All rights reserved.