User:Pengo/ot
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The Bornean Orangutan Pongo pygmaeus, previously Pongo pygmaeus pygmaeus
seen: TZO - Pongo pygmaeus pygmaeus possibly: BUD, |VZ
Gene flow between geographically isolated Bornean populations until recently
There is some evidence that orangutan-like climbing was in the ancestry of humans. [Analysis of Vertebrate Structure 5th Ed]
[edit] sequenced
Sumatran orangutan, mtDNA [1] Bornean orangutan, mtDNA
Two are seperate species 1996: [2] Diverged 1.5-1.7 million years ago, well before the two islands separated (Borneo, Sumatra). Bigger gap than chimpanzee and bonobo.
different species weight the same [3] (1975)
[edit] Sumatran
cf: Pongo abelii (Sumatran Orangutan) aka Pongo pygmaeus abelii - stub
Sumatran Orangutans are avoid travelling on the ground more than their Bornean counterparts in part, perhaps, to avoid Sumatran tigers.
Predation risk comes from animals such as the Sumatran tiger and clouded leopards. To avoid predation females with infants especially build nests in trees and away from risky spots, such as popular fruit trees. [Sugarjito, J. 1983. Selecting nest sites by Sumatran orang-utans (Pongo pygmaeus abelii) in the Gunung Leuser National Park, Indonesia. Primates, 24, 467-74.]
