I was out mowing the lawn early this morning, and the blue jay that lives in our back tree objected. Any time I'd stop the mower he'd fly down and start doing little dominance displays in front of the mower, fluffing out his wings and making little charges at me, as if to say, "I don't fear you! Out of my yard. I don't want it mowed. See, see, I'm powerful!"
Then I'd start the mower again and he'd fly off.
Now the mowing is finished, the yard looks great, and the blue jay has forgotten that anything happened.