These make a really nice change to the typical zoo shots one sees, the wolf especially almost looks taken in the wild (I am NOT a nature photographer by any stretch of the word :) )
The only comments I might make is a possible slight crop out of the sky reflection on the right of the elephant shot (this is purely my aesthetic opinion!) and I would have liked to see a bit more of the wolf’s body. I would thus crop the wolf photo heavily on the left.
Post processing and colours look alright to me, I am not really qualified to judge them technically :) but I would personally be pleased with them, especially the second, the colours remind me of some of the old Nat Geo pics.
Good job all round, I think, I’d be glad with these :)