We, also, have Grosbeak but no dive bombers. We do, however, have Cardinals that would dive bomb into a mirror we had leaning against the garage. (for those of you who read it added a great feature to your landscaping I'm here to tell you....forget it!) My son learned to duplicate their call and he would call and they would immediately answer, over and over, day after day. Well, be that as it may, he and I often wondered what the cardinal thought he was saying!! We got rid of the mirror and my son stopped whistling, one of which or both, seemed to irritate him no end because from that time forward, every morning, he would go out to his car to find that cardinal had left his 'daily dump' down the side of his car door!
Last edited by Wonnie; 05-15-2017 at 12:35 PM.