The northern muriqui, also known as the Northern woolly spider monkey, is a primate species native to the Atlantic Forest of Brazil. It is characterized by its long limbs, prehensile tail, and a coat of soft, woolly fur. This species is known for its social behavior, often living in large groups and displaying complex interactions. Northern muriquis primarily feed on fruits, leaves, and flowers, making them important seed dispersers in their ecosystem. Unfortunately, they are classified as Critically Endangered due to habitat loss and hunting. Conservation efforts are underway to protect their remaining populations and restore their natural habitats.