Last night on my way to the bus I was tearing up the last little bit of the bagel that I hadn't finished, figuring I'd feed it to the pigeons. But when I got to the plaza in front of the PNC building, there weren't any pigeons; they were all roosting on a ledge on the building across the street. There were ten or a dozen sparrows, so I threw the bits I'd torn to them instead, and they started happily pecking and trying to pick up the pieces.
About five seconds later, all the pigeons landed--a flock of 25 or more. In typical pigeon fashion they began to bully the sparrows, so I threw some more bits to the smaller birds and then dropped the last of what I had directly at my feet. Pigeons not being the brightest birds on the planet, they went for the more recent movement, leaving the sparrows in peace.
What amuses me about the whole thing is that I didn't think the pigeons would even notice me--they were across the street and a good forty feet up. But they really did.