Apes are tailless primates who belong to the superfamily Hominoidea, which further divides into the family Hylobatidae which comprises gibbons, and the family Hominidae which includes chimpanzees, orangutans, gorillas, and human beings. They are found in the tropical forests of Africa and Southeast Asia.There are mainly two categories of apes and they are discussed as follows.Great Apes- As mentioned earlier, gorillas, chimpanzees, bonobos, and orangutans belong to the category of great apes. They are large and have human-like features. They can do abstract reasoning and learn quasi-linguistic communication, only when taught by humans. They have the capability of recognizing themselves when they see a mirror, which other organisms cannot easily do.Lesser Apes- Gibbons, and siamangs belong to the category of lesser apes. They are found in the subtropical and tropical rainforest of eastern Bangladesh, Northeast India, southern China, and Indonesia. They are comparatively smaller than great apes in terms of size.