These photographs are very good IMHO.
Bruce
I like the first one best. The dove is kind of an odd perspective, making it's head look unnatural to me. I'm not sure what's going on with the last two. On my monitor it looks like the bird was pasted onto that background. It seems separated somehow.
as mentioned by Terri, the bird looks pasted on my monitor too.
Compared to the earlier threads, this one is slightly off-putting. Like 1 only. Sorry.
I tell you Otavio,
Your lapwings are better than mine
To improve these, there are some odd blades of grass peeking out from behind the subject in shots #1 and #4 I'd clone out if mine.
Very nice though,