Here's a brochure The Wildlife Society put out for people interested in a career working with wildlife. As others have said, based on your interests, you're best bet would be a wildlife program.
I also should give you fair warning- the wildlife field is very competitive and the salaries aren't all that great. Even so, its a very rewarding line of work.
If you're serious about this as a career, you should try and get out in the field with biologists in your area (perhaps even an internship?). This will allow you to see what the work is like and will also give you field experience. Field experience is a huge asset when you go to find a job.
Wildlife Ecology Graduate Student
The University of Maine
Fish, feathers, and photography...that's pretty much what makes me tick.