Heermann's gull (Larus heermanni), at breeding colony on Isla Rasa, Baja California, Sea of Cortez, Mexico, North Anerica

Heermann's gull (Larus heermanni), at breeding colony on Isla Rasa, Baja California, Sea of Cortez, Mexico, North Anerica

Adult grey-headed albatross (Thalassarche chrysostoma) in flight in the Drake passage between South America and the Antarctic peninsula.

A grey-headed gull, Chroicocephalus cirrocephalus, in mid flight, catches fish, with fish between beak, above water with splashes, Londolozi Game Reserve, Sabi Sands, Greater Kruger National Park, South Africa