World's most intelligent animal

Cats: The cat (Felis catus) is a domestic species of small carnivorous mammal.

Chimpanzee: Chimpanzees are primates of the genus Pan which consists of the common chimpanzee and the bonobo.

Dog: The dog or domestic dog (Canis familiaris or Canis lupus familiaris) is a domesticated descendant of the wolf, and is characterized by an upturning tail.

Humans: Humans (Homo sapiens) are the most abundant and widespread species of primate, characterized by bipedalism and large, complex brains. 

Dolphin: A dolphin is an aquatic mammal within the infraorder Cetacea. Dolphin species belong to the families Delphinidae (the oceanic dolphins).

Elephant: Elephants are the largest existing land animals. Three living species are currently recognised: the African bush elephent. 

Gorilla: Gorillas are herbivorous, predominantly ground-dwelling great apes that inhabit the tropical forests of equatorial Africa.

Monkey: Monkeys are haplorhine primates, a paraphyletic group generally possessing tails and consisting of approximately 260 known living species.

Octopus: An octopus (octopuses or octopodes, see below for variants) is a soft-bodied, eight-limbed mollusc of the order Octopoda. 

Parrot: Parrots, also known as psittacines, are birds of the roughly 393 species in 92 genera that make up the order Psittaciformes.

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