The term 'Great Blue Herons' refers to a species of large wading bird found in North and Central America. They are the largest heron in North America, with a wingspan of up to 6.5 feet. They have a slate-gray body, white head and neck, and a long, pointed bill. Great Blue Herons are often seen standing motionless in shallow water, waiting for prey to come within reach. They feed on fish, frogs, small mammals, and insects.