"bookworm"?
An art history student.
I don't know what you call them, but they are studying organic chemistry.
A person that studies animals is called a Zoologist.
A person that specializes in studying reptiles and amphibians is known as a herpetologist.
The Spine.
herdsman
You call a person who likes animals animal advocate, animal lover, etc.
Taxonomist.
Tamer
It's a person that studies animals
An animal caller