The Grackle is a large bird that is 10 to 12 inches in length. It is remarkable for its iridescent head which may be green, violet, or blue. The female is similar, but slightly smaller. They are commonly found throughout the Eastern United States. Grackles usually forage on the ground. They do fly up to a feeder if they do not find seeds that have been dropped to the ground. Because they are heavier than the smaller birds, when they leave a hanging feeder, it sets the feeder to swinging.