The term "rhesus monkey" is commonly used to refer to the macaque species, specifically the Macaca mulatta. However, there are other synonyms for this primate species such as the Barbary macaque, crab-eating macaque, bonnet macaque, and lion-tailed macaque. These primates are known for their distinctive red faces and tails, making them a highly recognizable and popular subject for scientific research and entertainment. They are found in a wide range of habitats, from savannas and forests to urban environments, and are known for their high intelligence and complex social behavior. Whether you call them rhesus monkeys or one of their many synonyms, they remain fascinating creatures worthy of study and protection.