Sumatran orangutan mothers differ from one another in how they behave with and take care of their infants and how flexibly they adjust their mothering behaviors as their infants grow. Whilst mothers ...

For the first time in 15 years, the Philadelphia Zoo welcomed the birth of a Sumatran orangutan. The critically endangered species is part of a breeding program among zoos intended to ensure the ...

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 ...

The talk show host delivered his signature line while revealing the paternity results for a 4-month-old Sumatran orangutan named Siska When the Denver Zoo was ready to announce the paternity of a baby ...

Young orangutans master the art of building intricate treetop nests not by instinct alone, but by closely watching their mothers and peers. Researchers tracking wild Sumatran orangutans over 17 years ...