Somebody here did an experiment where they and their kid put eggs out in I believe it was a abandoned turkey nest and left a camera behind to record it and if I recall correctly crows were often the first ones there. I THINK this was part of some kind of national or regional experiment and crows were often found to be the first to raid a nest. I hope the person that did this will correct me, I can forget details sometimes because of my meds and don't want to come off like I am lying.