What are the main branch of zoology?

Answer 1

1. Zoography, also known as descriptive zoology, is the applied science of describing animals and their habitats.
2. Comparative anatomy studies the structure of animals.
3. The physiology of animals is studied under various fields including anatomy and embryology
4. The common genetic and developmental mechanisms of animals and plants is studied in molecular Biology, molecular genetics and developmental biology
5. Ethology is the study of animal behavior.
6. The ecology of animals is covered under behavioral ecology and other fields
7. Evolutionary biology of both animals and plants is considered in the articles on evolution, population genetics, heredity, variation, Mendelism, reproduction.
8. Systematics, cladistics, phylogenetics, phylogeography, biogeography and taxonomy classify and group species via common descent and regional associations.
9. The various taxonomically-oriented disciplines such as mammalogy, herpetology, ornithology identify and classify species, and study the structures and mechanisms specific to those groups. Entomology is the study of insects, by far the largest group of animals.
10. Palaeontology, including all that may be learnt of ancient environments.

This is from Wikipedia

Answer 2

To study about specific species of animals and learn about their functions and habitats.