Puerto Rico is a small island in the Caribbean that is a Commonwealth of the United States. It has 78 municipalities and a flag that symbolizes the government branches and rights of citizens. Some holidays celebrated in Puerto Rico include Three Kings Day, Eugenio María de Hostos' birthday, and Independence Day. A popular folk character is Juan Bobo, who gets into humorous situations due to his lack of intelligence. Traditional Puerto Rican music blends Spanish, Native American, and African influences. The tiny tree frog known as the coqui is a symbol of Puerto Rico, known for its loud call that can be heard at night.