The Redwings Black birds show up here for the start of spring . We do not have alot od crows around here. I thinking it has to do with what has been said on sprays and the virus . When I was small we had ducks for eggs and the crows would go after the eggs and the ducks try to fight them off . Until my Dad started to shot them and they left the eggs alone. I know of one farm have crows show up at a friends place. But they not around all the time.