Does anyone know any wild animal experts

I have to do an English project on a wild animal expert. I tried looking some up but I couldn't find any.

Here is a list of some animal experts that I could give you:
Charles Darwin (Naturalist)
David Attenborough (Naturalist)
Steve Irwin (Zoologist, Herpetologist, Conversationalist, and Naturalist)
Terri Irwin (Naturalist, Conversationalist, and Zoologist)
Bindi Irwin (Zoologist, Conversationalist, and Naturalist)
Jeff Corwin (Conversationalist)
Jack Hanna (Zookeeper)
Dave Salmoni (Animal Handler/Trainer)
Jarod Miller (Zoologist, Pet Expert, Naturalist)