bird birds bread columba livia domestica common domestic pigeon fancy pigeons fauna feathers feral pigeon plumage prolific rock pigeon symbol. symbolic variations variety white appearance color colorful colour colourful gregarious ground feeders iridescence iridescent pests pigeon pie pigeons plumage varieties Columba-livia-domestica domestic-pigeon fancy-pigeons feeders flock plumage-varieties resting roof roofing tiled tiles tiling appetite feeding garbage greedy scraps