Sumatran Orangutan

The Sumatran orangutan (Pongo abelii) is one of three recognized orangutan species and is found exclusively on the Indonesian island of Sumatra, primarily in the northern province of Aceh and small pockets of North Sumatra. Larger-bodied than most primates, adult males develop distinctive flanged cheek pads called flanges and are largely solitary, while females raise offspring through the longest known inter-birth interval of any mammal, typically six to nine years per infant.

Sumatran orangutans are critical seed dispersers in the lowland tropical rainforests they inhabit, moving large-seeded fruits across distances that few other animals can match. The IUCN Red List classifies the species as Critically Endangered, with the population estimated at fewer than 14,000 individuals as of the most recent assessment. Habitat loss driven by palm oil plantation expansion, illegal logging, and agricultural encroachment has eliminated the majority of suitable lowland forest, while the illegal pet trade continues to remove young animals from the wild.