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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]
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]
Demonic Males begins by explaining that humans, chimpanzees, gorillas and orangutans are a group of genetically related great apes, that humans are genetically closer to chimps than chimps are to gorillas, and that chimps and bonobos are most closely genetically related.
Orangutans are believed to be one of the most intelligent animals on earth and closely related to humans. The fact that they are on the brink of extinction is a great source of worry for many ...
There is aggressive competition by males over territory and access to larger shells. Large males win fights and steal shells from competitors. Another example is the dragonet , in which males are considerably larger than females and possess longer fins.
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 .
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. In a first, an orangutan was ...
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.