Apes are a group of primates that include species such as chimpanzees, gorillas, and orangutans. They are known for their intelligence, social behavior, and ability to use tools. Unlike monkeys, apes do not have tails and generally have larger brains relative to their body size. Apes are divided into two main categories: lesser apes, like gibbons, and great apes, which include bonobos, chimpanzees, gorillas, and orangutans. They primarily inhabit forests and woodlands in Africa and Asia, and many species are endangered due to habitat loss and poaching.