What is the role of Aristotle in the development of zoology?

Aristotle described 500 animal species, dividing them into groups that have red blood and no blood. To the first group, Aristotle attributed all higher animals: animals, birds, fish. The second group includes lower animals: insects, crayfish, molluscs. worms. The former were divided into invertebrates and vertebrates. Aristotle described the structure and ontogeny, distribution and meaning of animals popular at that time. The works of Aristotle were for that time a zoological encyclopedia. Significant work of Aristotle, which determined the further development of zoology – “History of Animals”. This work was written in the second half of the 4th century. BC.