Hi! Ok, maybe not the very best, but I am trying very hard to decide between the Nikon D80 and the Canon 400D (XTi). I've ready many reviews, some lean towards Nikon, others towards Canon. Is one of these better (better image quality, colors, etc) for nature and wildlife photography? I would appreciate some input!

It really depends on how it feels to use it. And your budget.
I have used Canon cameras for years and have built a nice collection of lenses. The EOS lenses that I have all work on the digital SLR's. For me, that was important.
I have seen the results of Nikon DSLRs along with the Canon. The difference is really quite small. If you can actually tell the difference, purchase the one whose images look better.

Hi! Ok, maybe not the very best, but I am trying very hard to decide between the Nikon D80 and the Canon 400D (XTi). I've ready many reviews, some lean towards Nikon, others towards Canon. Is one of these better (better image quality, colors, etc) for nature and wildlife photography? I would appreciate some input!
I have a Canon Rebel digital its been awsome, I made the conversion from a Pentax LX that I used for bird photography since the mid 80s. I would highly recommend the Cannon