The common grackle is a beautiful but nasty bird who will eat most anything from nestling birds or eggs, frogs, small fish and mice. They usually chase other birds away from our feeder where they feast on sunflower seeds. They are glossy black or browninsh black twelve-and-a-half- inch birds with beautiful yellow eyes and iridescent, purplish blue heads. They are noisy, and their harsh cacks and metallic calls are not in the least muscial. They are found throughout eastern North America and migrate south in the fall.