Smart animals - Most Intelligent Animals

Animal cognition encompasses the mental capacities of non-human animals. The study of animal conditioning and learning used in this field was developed from comparative psychology. It has also been strongly influenced by research in ethology, behavioral ecology, and evolutionary psychology; the alternative name cognitive ethology is sometimes used. Many behaviors associated with the term animal intelligence are also subsumed within animal cognition.[1]

Researchers have examined animal cognition in mammals (especially primates, cetaceans, elephants, dogs, cats, pigs, horses,[2][3][4] cattle, raccoons, and rodents), birds (including parrots, fowl, corvids, and pigeons), reptiles (lizards, snakes, and turtles[5]), fish and invertebrates (including cephalopods, spiders, and insects).[1]