Human-orangutan conflict and hunting are thought to pose a serious threat to orangutan existence in Kalimantan, the Indonesian part of Borneo. No data existed prior to the present study to substantiate these threats. We investigated the rates, spatial distribution and causes of conflict and hunting through an interview-based survey in the orangutan's range in Kalimantan, Indonesia. Between Apri...

Great apes are threatened with extinction, but precise information about the distribution and size of most populations is currently lacking. We conducted orangutan nest counts in the Malaysian state of Sabah (North Borneo), using a combination of ground and helicopter surveys, and provided a way to estimate the current distribution and size of the populations living throughout the entire state....

The larvae of Didimus africanus (Percheron), D. haroldi Kuwert, D. alvarodoi (?) Corella, D. parastictus (Imhoff), D. nachtigali Kuwert, Erionomus planiceps (Esch.), E. pilosus Arrow, Taeniocerus pygmaeus (Kaup) and Comacupes basalis (Smith) are described for the first time. Larvae of Leptaulax bicolor (F.), L. dentatus (F.) and Aceraius grandis (Burm.) are redescribed and compared with previou...