we have had millions of them roosting here in the winter..they got so bad the city bought some propane cannons to try and scare them off..finally got a crop duster to fly over the roost and spray something on them at night that would make them freeze to death..I bought a tube extender for my 12 ga.1100 and it would hold 8 shells..we would shoot them in the feedlot til the barrel would almost melt..you couldnt dare touch it..