I was walking down polk street in san francisco when i passed a little ally. Just inside the ally hundreds of pidgens were feeding on a big sack of grain spilled on the sidewalk. When i walked by they all flew up, scared the hell out of me. I stood inside the ally photographing them as they circled the building a couple of times before landing back on the grain to feed. Then someone new would come by and the birds would scare the hell out of them.