This movie has been plaguing my brain for years. All I can recall is that a boy walks over a hill and looks down to see thousands of dead birds on the ground. I believe that this scene signaled the end of an event (I think it was an alien movie so it was the end of an invasion). I remember this scene so vividly but can’t for the life of me remember what movie it’s from.
This sounds a lot like a scene from Flashforward, at short-lived TV series.
http://www.imdb.com/title/tt1441135/
I believe this is the scene you remember:
https://youtu.be/ILDeoej1nQs