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, Ecuador.

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 at nest site on Isla San Pedro Martir, Baja California, Mexico, North America

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

Red billed tropic bird (phaeton aethereus) A red billed tropic bird and the archetypal long streamer of a tail. Gulf of California.

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

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) pair in flight over Isla San Pedro Martir in the Gulf of California (Sea of Cortez), Mexico.