First:
Agreeing with Mav, buy a good piece of glass first, along with a used camera. If you want good, detailed pictures, a good camera with a crap lens is sure to make you give up.
Second:
I know some people here that bowhunt, so I might have to get with them for some advice since their ranges are usually 40-80 yards, as long as they don't tell me they sit in a blind all day until something comes along, that sounds about as exciting as watching an episode of The Waltons.
Sorry, Charlie. I'm really not meaning to be a bubble-burster here, but be prepared to watch a LOT of Waltons episodes. In wildlife photography patience is THE name of the game....PERIOD. Do not expect to take a hike in the woods and have animals just sit in front of you posing for pictures. Consider yourself lucky if you get one really good shot in a weeks time, if not a few weeks or a month. I have been into wildlife photography for about 22 years now, and can tell you that, to me, it is one of the most rewarding aspects of photography, but also one of
the most frustrating.
My favorite subect is birds, which to get any kind of detail, you must be within 15 to 30 FEET, not yards, with a short range zoom. This potentially means sitting very still in blinds for hours at a time around a nest, hoping that mommy bird comes back sometime soon. When she does, you move very slowly to take the picture, and just as you are about to press the shutter....bye, bye. Literally, if I had a nickel for each time this happened, I would have that 600mm AF-S II VR by now...

Mammals are even more skiddish. But, fortunately, they are a little larger, so they can be photographed from a slightly greater distance.
I'm really sorry if I sound like a sour-puss here. This is just along those pet peeves of "your camera takes nice pictures". I don't know how many times I have heard "Wow, you are lucky to have gotten that shot...." Maybe a little luck had something to do with it, but I like to think the hours of research, field observation, and shear boredom, puctuated with moments of "OMG, there it is", only to have your heart sink when it took off right before you could get the shot, made the difference in my pictures. Just asking that if you are serious, be prepared for this.