This year I had a pair of very bold Stellar Jays that were diving down from the tree and getting straglers. I tried a plastic owl. No good. When they started attacking the cats constantly around the house, the bb gun came out and a couple well placed shots at low power convinced them that this yard is not a good place to play. I can still hear them in the neighborhood, but they stay away now. Very, very smart birds. Rate right up there with crows.