In primates, the biggest, bossiest males usually get to father the most offspring; and for a long time it was thought that this rule applied to orangutans too. Male orangutans openly compete; and it's ...

Taxonomy, geographic variation, and population genetics of Bornean and Sumatran orangutans / Benoît Goossens ... [et al.] -- The functional significance of variation in jaw form in orangutans / Andrea ...