Adult red-billed tropicbird (Phaethon aethereus), Isla San Pedro Martir, Gulf of California (Sea of Cortez), Baja California, Mexico, North America

Adult red-billed tropicbird (Phaethon aethereus), Isla San Pedro Martir, Gulf of California (Sea of Cortez), Baja California, Mexico, North America

Adult red-billed tropicbird (Phaethon aethereus), Isla San Pedro Martir, Gulf of California (Sea of Cortez), Baja California, Mexico, North America

Adult red-billed tropicbird (Phaethon aethereus), Isla San Pedro Martir, Gulf of California (Sea of Cortez), Baja California, Mexico, North America

Red-billed tropicbird (Phaethon aethereus), Punta Pitt, San Cristobal Island, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Adult red-billed tropicbird (Phaethon aethereus), Isla San Pedro Martir, Gulf of California (Sea of Cortez), Baja California, Mexico, North America

Adult red-billed tropicbird (Phaethon aethereus) in flight in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Seabirds Tropicbirds, Pajaros Islet (Swan's Cay off the coast of Boca del Drago on Colon Island, Bocas del Toro Archipelago, Republic of Panama, Central America

Adult red-billed tropicbird (Phaethon aethereus) in flight at nest site on Isla San Pedro Martir, Baja California, Mexico, North America

Adult red-billed tropicbird (Phaethon aethereus), in flight near nest at Isla San Pedro Martir, Baja California, Mexico, North America

Adult red-billed tropicbird (Phaethon aethereus) in flight in the Galapagos Island Archipelago, Ecuador

Three Red-billed Tropicbird (Phaethon aethereus) in flight during mating season over Isla San Pedro Martir in the Gulf of California (Sea of Cortez), Mexico.

Red-billed Tropicbird (Phaethon aethereus) in flight over Isla San Pedro Martir in the Gulf of California (Sea of Cortez), Mexico. (rr)

Red-billed Tropicbird (Phaethon aethereus) pair in flight over Isla San Pedro Martir in the Gulf of California (Sea of Cortez), Mexico.