The Red-billed Tropicbird,Phaethon aethereus, also known as the Boatswain Bird is a tropicbird, one of three closely related seabirds of tropical oceans. It occurs in the tropical Atlantic, eastern Pacific and Indian Oceans.
The Indian Ocean race of the Red-billed Tropicbird, P. a. indicus, was at one time considered a full species, the Lesser Red-billed Tropicbird from Pakistan and the western Republic of India.
