There should be a word for this. As it is, the colours of the pigeons mirrored (!) by the colours of the background buildings tie this urban thing all together despite the delighful orgy of pigeon mayhem.
This is a case of where SP doesn't need humans - when I take the time to study the pigeons I see them in different groupings - I do anthropomorphism very well :) and imagine what they are doing/saying ... I like the oof bird in the f/g - nicely done.
Heh! Be sure to post this in the Pigeon thread after the challenge. And they do most certainly look like a gang of young thugs - hanging out and undoubtedly causing problems. This might also work well in B&W.
The focus of the flying bird distracts from the scene. I also have a hard time fitting this into what my idea of what street photography is. This shot seems random, not thought out or composed.