yes, they will be carrion crows, once they get into ur birds they will not give up, I had to stop racing one year, they were taking my old birds out of the sky, lost 8 in one year, they are worse than hawks if they are in ur area, and you cant touch them , carrions are classed as vermon but a heavy fine if you didturb them or destroy them, they take over their area when nesting ,will chase anything even hawks, but hawks always come back, pm me if you want. for more info, hawks kill to feed carrions kill all the time,