The Sumatran orangutan is a critically endangered species native to the island of Sumatra in Indonesia. It is known for its long, reddish-brown hair and strong, flexible limbs, which help it navigate the treetops of tropical rainforests. Sumatran orangutans are primarily arboreal, spending most of their lives in trees, where they find food such as fruits, leaves, and insects. These orangutans are highly intelligent and exhibit complex behaviors, including tool use and problem-solving. They play a crucial role in their ecosystem by helping to disperse seeds, which promotes forest growth. Conservation efforts are essential to protect their habitat from deforestation and illegal hunting.