01. Grey parrot is considered to be a very intelligent bird. This kind of parrot is striking in its intelligence and loyalty. Thus, the parrot, Alex, who is engaged to an American scientist Irene Papperberg the University of Arizona, distinguishes 50 different objects. And fluent and able to logically explain the distinction between different objects.
02. Pig has an excellent memory, and intuition, they respond his name and understand the value of some other words. They have a complex social structure, and they better decide on thinking tests than some primates.
03. Elephants are very intelligent and emotional creatures. They grieve for the dead relatives and sometimes can recognize them on the tusk and skull. They lie for days in the dead relatives, until they begin to decompose.
04. Sea lions also are animals who can think logically. Seven-year sea lion Rio proved the existence of logical thinking by means of special tests, which determined that if a = b and b = c, then a = c.
05. Chimpanzees are well known for its ability to think. Recently it became known that they even plan their future, in advance considering their next steps.
06. The dog has long been considered man's best friend and a very intelligent animal. Dogs can learn up to 300 words, his mind is compared with the mind year-old child. (Dave-F)
07. Crows have the largest brain size among birds. They know how to think, learn and feel emotions. They are very resourceful and can even pick the right tool to perform a particular operation.
08. According to scientists, African baboons in terms of behavior similar to a person. They have complex social systems, they may experience stress and are able to think abstractly. (Chi King)
10. Dolphins are one of the few animals on earth who can recognize themselves in the mirror. They know who their mother, the leader of their group and relate differently to their relatives. (La Prima Donna)