I would like a job like Jungle Jack Hanna. What do I need for a major in college in order to do this and what field should I pursue?

A job like mine? Well, in today's zoos, you will need college training for an animal keeping position (see FAQ about training requirement) As far as doing TV shows about wildlife, I'm not sure exactly what to recommend because it just kind of happened to me! I guess, first of all, you need to become very knowledgeable about animal life, and somehow establish yourself as an "expert" (which I'm not — I just like to share my experiences and those of others).