hmm, not sure if I'm missing the wildlife in this one. I'm staring, now glaring, nope.. No animal.. Other than that, it's a nice shot. I like the position of the nest and the branches around it, gives us an idea of where it was living.
DNMC to me, the challenge does state to get non domesticated mammals, birds, reptiles and amphibians living in a natural environment. You've got the environment down pat, for which I will give you 4, but you're missing the key element - the bird/s.
I love the shot, just wish it had some wildlife in it. Had this been entered in another challenge I think it would do well, but not so when folks are expecting to see a bird or animal of some wild type