It's really fun to take a second look at images, this is one of those shots that have a lot of interest when you take the time to really look at it. First time I saw it I was not all that impressed but after taking a second look I love the way the flying shadow flows directly off the sitting bird. Nice capture!
This is well seen, perfectly timed, and with a great leading line with the shadow, and the one pigeon framed in the black hole.
It's a shot well worth a comment.
Is that a bird on the windowsill? And then another bird flying in?
It took me a second to figure everything out ;)
I think the composition would be a bit better if would've given the bird shadow a bit more room - it seems a bit close to the frame and crowds your lower left hand corner.