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Washoe, a captive female chimpanzee, was able to learn American Sign Language (ASL), with a vocabulary of 350 words.Ī 2019 PNAS study suggested that chimpanzees, along with all great apes, possess a ‘Theory of mind’, a capacity once thought to be unique to humans. How clever are chimpanzees?Īs well as using tools, some chimpanzees have been able to learn basic human sign language. Although illegal snare hunting is the leading cause of injury and death among chimps in Uganda. This can lead to limb amputations, infections and eventually death.
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They are also frequently caught in snare traps that are placed by poachers to trap other forest animals. 38: 193-209.Chimpanzees are classed as Endangered on the IUCN Red List – numbers are decreasing because of habitat loss and fragmentation, killing for bushmeat and the infant pet trade and disease. Interactions between overlapping multimale groups of black and white colobus monkeys ( Colobus guereza) in the Kakamega Forest, Kenya. Zur Biologie und Soziologie der Colobusaffen ( Colobus guereza caudatus Thomas 1885). (ed.), Socioecology and Psychology of Primates, Mouton, The Hague. (1975) Comparison of the behaviour and ecology of red colobus and black-and-white colobus monkeys in Uganda: A summary. Patterns of predation by chimpanzees on red colobus monkeys in Gombe National Park, Tanzania, 1982–1991. B., Wallis, J., Matama, H., and Goodall, J. The influence of chimpanzee predation on group size and anti-predator behaviour in red colobus monkeys. (eds.), Neue Ergebnisse der Primatologie, Gustav Fischer-Verlag, Stuttgart. In Starck, D., Schneider, R., and Kuhn, H.-J. On the sociology of free-ranging colobus ( Colobus guereza caudatus Thomas 1885). (eds.), Old World Monkeys: Evolution, Systematics and Behaviour, Academic Press, New York. Ecology, zoogeography, and systematics of some african forest monkeys. (ed.), Primate Ecology, Academic Press, London. The social life of a black and white colobus monkey, Colobus guereza. Colobus guereza: Territoriality and group composition. Social organization of a free-ranging troop of black and white colobus monkeys ( Colobus abyssinicus). Bird communities in Kyambura Game Reserve, southwest Uganda. Population density and intra-and interspecific competition of the African fish eagle Haliaeetus vocifer in Kyambura Game Reserve, southwest Uganda. Notes on the black and white colobus monkey in Kenya. Notes on the ecology and behaviour of the Angola colobus ( Colobus angolensis P L Sclater 1860) in N.E. Contrasts in social structure among black-and-white colobus monkey groups. Ecology and population dynamics of Colobus guereza in Ethopia. Primate Social Systems, Croom & Helm, Beckenham.ĭunbar, R. Habitat quality, population dynamics, and group composition in colobus monkeys ( Colobus guereza). Colobine Monkeys: Their Ecology, Behaviour and Evolution, Cambridge University Press, Cambridge.ĭunbar, R. (eds.), Colobine Monkeys: Their Ecology, Behaviour and Evolution, Cambridge University Press, Cambridge.ĭavies, A. (eds.), The Mammals of Africa: An Identification Manual, Part 3, Smithsonian Institution Press, Washington, DC.ĭavies, A. Feeding behaviour of red colobus and black and white colobus in East Africa. thesis, Cambridge University, Cambridge.Ĭlutton-Brock, T. Red Colobus: Feeding and Ranging Behaviour, Ph.D. Chimpanzee predation as a possible factor in the evolution of red colobus monkey social organization. Chimpanzees-red colobus monkeys: A predator-prey system.
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