I like it. I wonder if it would be better to crop a little into the tree on the left. As it is, instead of being "wall-to-wall" tree and birds, there is just a little empty sky on the left - just a thought.
It's a conundrum. There was too much upright going on to the immediate left to leave, and cropping in tighter created too close to having to go to a square crop which I didn't like for this image as being too confining.