This Boat-tailed Grackle pair was seen harassing a Bald Eagle who was minding his own business. After about fifteen minutes the grackles tired of the game and left the eagle alone. Canon EOS 7D, Canon EF 500mm f/4L IS USM lens with Canon 1.4x extender, f/8, 1/1000 sec, -.7 EV, ISO 400.