The Delaware Blue Hen is a breed of domestic chicken known for its distinctive blue feathers and friendly temperament. Developed in the United States, it was created in the 1940s by crossing several breeds, including the Plymouth Rock and New Hampshire Red. This breed is valued for both its meat and egg production, making it a popular choice among poultry enthusiasts. In 1939, the Delaware Blue Hen was designated as the official state bird of Delaware. It symbolizes the state's rich agricultural heritage and is often associated with the University of Delaware's sports teams, known as the Blue Hens. The breed's unique color and history contribute to its significance in American poultry culture.