This bird showed up at my back porch door. I knew he was a pigeon but that was all. He was dirty, fluffy and determined to get onto my porch. I shooed him away. the next time I went out on the porch he was hanging on to the screens. This kept up for hours. I didn't want a pigeon, why wouldn't he go away? Ultimately he slipped into the porch between my feet and proceeded to eat all the seed my birds had spilled. After trying to grab him many times I gave up. He moved into the rafters of the porch but that was not to last. He was a mighty pooper.