Monkeys are a diverse group of primates that are found throughout the world, primarily in tropical and subtropical regions. There are over 250 species of monkeys, which range in size from the tiny pygmy marmoset, which weighs less than a pound, to the large mandrill, which can weigh over 100 pounds. Monkeys have opposable thumbs, which allow them to grasp and manipulate objects, and they are known for their intelligence and social behavior. Some species, such as baboons and macaques, live in large groups with complex social structures, while others, such as orangutans, are more solitary. Monkeys are omnivores and eat a variety of foods, including fruit, insects, and small animals. Unfortunately, many species of monkeys are currently facing threats from habitat loss, hunting, and the pet trade. Monkeys are fascinating animals that have captured the imagination of humans for centuries, and they continue to be the subject of study and conservation efforts.