I'm afraid you have what looks like multiple poorly cut out photos of a dead bird scattered about on a photo of a girl with hair cloned to look like it's blowing in the wind. Looking at the image at full size it's very obvious that you need to practice cutting out with the lasso tool, you have jagged edges on the bird (these can only be avoided by time consuming and painstaking work) and a halo where you have had the feather setting too high. The position of the bird on the grass doesn't look natural, it would only look really natural and like a dead bird
on the grass if it had actually been placed on the grass and photographed it there. Using the same cut out image scattered about to look like birds flying hasn't worked, either. It might have worked better if you'd repositioned the dead bird into a flight mode, taken another photo and tried using that.
As for the girl's hair flying in the wind, well, nice idea but again it's a lot harder to make that work and look credible than it sounds. It would have been MUCH easier and more effective to borrow a big fan and really have her hair blowing. I've been cutting, pasting and cloning for something like 13 years - I know that with all my experience I couldn't get the effect you are trying for and make it look realistic.
The girl and the bird have nothing tying them together, her hand should be in a position like she's reaching out to stroke the bird or something similar or she needs to be looking at the place where it is. As I see it she appears to be looking at her hand. As an alternative she could be looking at the birds flying around. There needs to be some connection to make this work.
I think I see what you are trying to do and I think it would indeed look weird and dark if you pulled it off. Something like this isn't going to come together by taking a couple of random photos, spending half an hour in Photoshop and adding some colouring effects. You need to plan your photo in advance and work towards the image in your head... if it still doesn't work you'll have gained experience (and maybe some skills) for your next attempt!
Good luck!