The Great Blue Heron (Ardea herodias) breeds from South Alaska and South Canada to Chiapas and Belize. Winters in South America. This solitary bird inhabits in shallow freshwater or salt water, marshes, and wet fields, margins of lagoons, streams, seashores, river mouths, and mangroves.
This is the largest heron in Costa Rica with 132 cm (52 inches) heights and 2.5 kg weights. Adults have a white head, and neck brownish-gray. Body and wings are mostly blue-gray, with black patch on side of breast. Bill yellowish, and legs blackish. Its diet is based on fishes, frogs, rodents, crustaceans, or large insects.