Orangutan

ABSTRACT Reintroduction is an increasingly common approach to protecting displaced wildlife and a useful conservation tool. Reintroduction is especially important for great apes, humans’ closest living biological relatives, who are seriously threatened with extinction. Orangutans are among the most threatened ape species and have been subject to the most extensive reintroduction efforts. Orangutan reintroduction success rates are commonly considered unsatisfactory, however, so improving success is a high priority. Behavioral rehabilitation, the greatest and slowest of these processes, is critical to success. Age-graded forest schools may be among the most effective programs for rehabilitation. This document offers guidelines and standards for orangutan forest schools that should (a) improve methods for encouraging adaptive learning and discouraging counterproductive learning, (b) respect current international standards for reintroduction, and (c) improve the evaluation of progress in individual orangutans, facilitate early identification and remediation of problems, and assess forest school effectiveness. We focus Bornean orangutans; considerations differ somewhat for Sumatrans. Our aims were to design forest schools that are ethically, scientifically, and practically credible.

Wild Man from Borneo offers the first comprehensive history of the human-orangutan encounter. Arguably the most humanlike of all the great apes, particularly in intelligence and behavior, the orangutan has been cherished, used, and abused ever since it was first brought to the attention of Europeans in the seventeenth century. The red ape has engaged the interest of scientists, philosophers, artists, and the public at large in a bewildering array of guises that have by no means been exclusively zoological or ecological. One reason for such a long-term engagement with a being found only on the islands of Borneo and Sumatra is that, like its fellow great apes, the orangutan stands on that most uncomfortable dividing line between human and animal, existing, for us, on what has been called “the dangerous edge of the garden of nature.”
Beginning with the scientific discovery of the red ape more than three hundred years ago, this work goes on to examine the ways in which its human attributes have been both recognized and denied in science, philosophy, travel literature, popular science, literature, theatre, museums, and film. The authors offer a provocative analysis of the origin of the name “orangutan,” trace how the ape has been recruited to arguments on topics as diverse as slavery and rape, and outline the history of attempts to save the animal from extinction. Today, while human populations increase exponentially, that of the orangutan is in dangerous decline. The remaining “wild men of Borneo” are under increasing threat from mining interests, logging, human population expansion, and the widespread destruction of forests. The authors hope that this history will, by adding to our knowledge of this fascinating being, assist in some small way in their preservation.

Abstract Rehabilitation centers in Indonesia and Malaysia accommodate displaced orangutans (Pongo pygmaeus and P. abelii) and aim to facilitate their release into the wild by developing in them the skills that are necessary for survival. Regular forest excursions ...

Tool use in extant primates may inform our understanding of the conditions that favoured the expansion of hominin technology and material culture. The 'method of exclusion' has, arguably, confirmed the presence of culture in wild animal populations by excluding ecological and genetic explanations for geographical variation in behaviour. However, this method neglects ecological influences on culture, which, ironically, may be critical for understanding technology and thus material culture. We review all the current evidence for the role of ecology in shaping material culture in three habitual tool-using non-human primates: chimpanzees, orangutans and capuchin monkeys. We show that environmental opportunity, rather than necessity, is the main driver. We argue that a better understanding of primate technology requires explicit investigation of the role of ecological conditions. We propose a model in which three sets of factors, namely environment, sociality and cognition, influ...