There are lots of different ones, but two could be a zoologist or a wildlife biologist.
A zoologists research and work with animals and wildlife populations while a wildlife biologist solely focuses on animal biology.
Zoologists will study animal behavior, genetics, diseases and things such as life progression. A wildlife biologist performs experimental studies and collects data from their specimens. They look at human impact on animals and the animals characteristics.
Hope this helps :)
This wasn't googled, I know this because I have been studying animal biology for some time now.