The rescued baby birds were indeed wood pigeons - a bird of the countryside, which nests in trees (and doesn't scavenge in bins).However, MM has raised the issue of feral pigeons, which, as everyone knows (I thought) nest in buildings, as do many other birds, including the endangered sparrow. Perhaps this opportunity could be taken to establish the council's policy for their contractors who discover nests during building work. Robin, could you ask the question?