Her work has shown that reproductive hormones in female orangutans peak when fruit is most abundant in the forest—an adaptation to the boom-and-bust environment. “It makes a lot of sense,” K ...

At the orangutan enclosure in the zoo, there’s a small slit in the glass for visitors to feed the animals. A child first ...

6. What do orangutans eat? Fruit makes up about 60% of the orangutan's diet, including lychees, mangosteens, mangoes, and figs. They also eat young leaves and shoots, insects, soil, tree bark, and ...

Sumatran orangutans are reported to have closer social ties than their Bornean cousins. This has been attributed to mass fruit on fig trees, where groups of Sumatran orangutans can come together to ...