What is a "rhesus monkey"?

The rhesus monkey, also known as the Macaca mulatta, is a species of Old World monkey characterized by its medium size, reddish-brown fur, and long tail. They have a prominent face with a broad nose and pronounced cheekbones, and are known for their agility and adaptability. Rhesus monkeys are highly social animals, living in complex social groups and exhibiting a wide range of behaviors, including grooming, vocalizations, and interactions with their environment. They are widely distributed in various habitats across Asia, and are known for their resilience and ability to thrive in diverse environments.