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Homosexual behaviour has been recorded in the context of both affiliative and aggressive interactions. [66] Mother orangutan with young. Unlike females of other non-human great ape species, orangutans do not exhibit sexual swellings to signal fertility. [65]
Bornean orangutans (Pongo pygmaeus) exhibited aggression in almost 90 percent of their copulations, including when the females were not resisting. [13] A possible explanation for aggressive behaviors in primates is that it is a way for males to train females to be afraid of them and be more likely to surrender to future sexual advances. [1]
Infanticide in non-human primates occurs when an individual kills its own or another individual's dependent young. Five hypotheses have been proposed to explain infanticide in non-human primates : exploitation , resource competition , parental manipulation, sexual selection , and social pathology .
Sumatran orangutan (Pongo abelli) Hominoidea is a superfamily of primates. Members of this superfamily are called hominoids or apes, and include gorillas, chimpanzees, orangutans, gibbons, bonobos, and humans. Hominoidea is one of the six major groups in the order Primates. The majority are found in forests in Southeastern Asia and Equatorial Africa, with the exception of humans, which have ...
Competition and aggression. If intra-group competition becomes too high, the associated stress can potentially impose negative health impacts. [4] Cognitive capabilities. There is an assumption that cognitive abilities must be able to interpret the complex information of group living (including information resulting from social relationships). [4]
A wounded orangutan was seen self-medicating with a plant known to relieve pain. It's the first time an animal has been observed applying medicine to a skin injury.
Ponginae / p ɒ n ˈ dʒ aɪ n iː /, also known as the Asian hominids, is a subfamily in the family Hominidae.Once a diverse lineage of Eurasian apes, the subfamily has only one extant genus, Pongo (orangutans), which contains three extant species; the Sumatran orangutan (Pongo abelii), the Tapanuli orangutan (Pongo tapanuliensis) and the Bornean orangutan (Pongo pygmaeus).
World Wildlife Fund explains that just a hundred years ago there were more than 230,000 orangutans in total and that those numbers have rapidly declined leaving only 100,000 Bornean orangutans left.