A Wild Female And Male Orangutan Teamed Up To Murder Another Orangutan

A Wild Female and Male Orangutan Teamed Up To Murder Another Orangutan

Anthropologists in Borneo observed a rare instance of a female and a male orangutan teaming up — to kill another female orangutan. This is the first observed time a female-female conflict in orangutans has turned lethal, and the way the it went down changes what we thought we knew about orangutan behaviour. Primates, being known jerks, attack each other fairly often but an attack reported in the journal Behavioural Ecology and Sociobiology changed what we know about one particular type of primate. Anthropologist Anna Marzec, from the University of Zurich in Switzerland, describes the incident which took place in the Mawas Reserve in Indonesia. It sounds pretty grisly.

A Wild Female and Male Orangutan Teamed Up To Murder Another Orangutan

The fight was instigated by a female named Kondor. Kondor had some issues with an older orangutan female Sidony (pictured to the left), who had hit and bit Kondor when Kondor approached Sidony's daughter. Kondor, who had no dependent children at the time of the fight, had been hanging out with Ekko, a young male. Just before the fight started, Ekko had gone to "sexually inspect" Sidony but had gone back to mate with Kondor. Kondor broke off the mating, ran over to Sidony and started attacking her.

The fight developed into something more than just a few bites or hits. When Sidony tried to get away, Ekko blocked her path. When Kondor stopped attacking, Ekko started. For 33 minutes, the two took turns beating and biting Sidony — with Ekko inflicting more damage due to his larger canines. Then things got even weirder.

The fight might have gone on longer, but another male, Guapo, jumped into the fight and chased Ekko away. He did not chase Kondor away, although he alternately helped Sidony get away and pushed himself between the females when Kondor subsequently attacked Sidony. Sidony mated with Guapo during this time. Though Guapo did provide protection from Kondor, Sidony's existing injuries were too extensive. She weakened steadily and died two weeks later.

Orangutans are relatively solitary. Females and males almost never interact unless it's time to mate — not surprising, since the researchers describe mating as often due to "coercion". Orangutans are also "philopatric", meaning female relatives will settle close enough that their ranges overlap, but they rarely form tribes or groups. Males sometimes get into serious fights, but the fact that females can get into lethal fights is big news, even if it is one incident.

What's more amazing is the fact that females used the males as "hired guns" to protect them or kill with them. It's a disturbingly human act that teaches us something new about orangutan sexual dynamics. According to the report, "even in a species in which coercion is frequently observed in male-female interactions, female leverage over males can coax males into providing services, such as coalitionary support". Sounds good, but as we see, that "coalitionary support", has a real dark side to it.

[Behavioural Ecology and Sociobiology]

Image: Eric Kilby / Inline image of Sidony : Anna Marzec


Comments

    There are probably corollaries in most species. We focus on primates because it's so easy to anthropomorphise them, but the interactions really aren't that much different from many bird species, things like wolfs, cats (big and small), perhaps even insects and arachnids.

    At no point does it say that Sidony asked Guapo to help her. He "jumped into the fight". Later she mated with him. It's not suggested that she offered him sex for help. Some species are known to do this. It doesn't look like it's what happened here. This might seem like a small difference, but it's a point worth making. As someone else said, it can be easy to anthropomorphise - this is an orangutan drama, not a human one. I agree there's a lot to be got from this, but we have to stick to the facts as we have them.

    No Discussion - ONLY HUMANS CAN MURDER.
    An orangutan is an animal and unless we accord them the full rights and privileges of a human being (which a lot of us don`t deserve) the use of that word is wrong.

      Your argument that granting rights to orangutans could make them capable of murder, is garbage.

      A genetic test will show that an orangutan-with-rights is a non-human, incapable of murder.

      We *could* make orangutans capable of murder by changing the definition of murder:
      "The killing of another ape under conditions defined in law".

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