Question

What the branch of a zoologist

Answer 1

Zoologist can be broken into lots of categories.

1. Entomology (Studies insects)
2. Ornithology (Studies birds)
3. Herpetologist (Studies reptiles and amphibians)

I only gave you a few but there are lots of categories for a Zoologist, so it's a very broad topic.

Answer 2

The branch of biology that deals with animals and animal life, including the study of the structure, physiology, development, and classification of animals.  The animal life of a particular area or period: the zoology of Alaska; the zoology of the Pleistocene.