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 appetite feeders feeding flock garbage greedy scraps block blocks cobble cobbled cobbling eye nature pavement paving red road rock rocks saavem scene scenes stone street wing wings ancient archaeology bare barren bleak desert dry harsh historical home house Israel Massada old Remains rocky ruins sere walls architecture bust Charles Darwin Columba livia darwin dove evolution La Plata museum naturalist paloma rock dove science scientist sculpture statue Victorian zoologist zoology