The black leaf monkey, also known as the spectacled langur, is a species of primate found primarily in the tropical forests of Southeast Asia. These monkeys are characterized by their black fur, distinctive white eye patches, and long tails. They primarily feed on leaves, fruits, and flowers, which is why they are called leaf monkeys. Black leaf monkeys are social animals that live in small groups, typically consisting of a few females and their young, along with one or more males. They are known for their agility in trees, using their long limbs to navigate through the forest canopy. Their populations are threatened by habitat loss and hunting.