Hopes that a viable population of orang-utans can be conserved in Malaysian Borneo have been given a big boost by the discovery that they are more widespread than had been expected. In August-November last year a research team, consisting of officers from the National Parks and Wildlife Office of the Sarawak Forest Department and five scientists sponsored by WWF Malaysia, surveyed the proposed Lanjak-Entimau Orang-Utan Sanctuary adjacent to the Indonesian frontier. Previous reports had led them to expect to find orangs in the southern part of the proposed sanctuary, where the terrain is mostrugged and there has been least human activity, but the development of anovel survey technique showed that the apes in habit the northern part as well.