Hiroya Minakuchi / Humpback Whale (Megaptera novaeangliae) pair gulp feeding and gulls hunting Northern Anchovy (Engraulis mordax), Monterey Bay, California

Igor Shpilenok,Igor Shpilenok / Kamchatka Brown Bear (Ursus arctos beringianus) on the Pacific coast of Kamchatka. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, July.

Michael Pitts,Michael Pitts / Sooty Terns (Onychoprion fuscata) flock in flight, Midway Island. Central Pacific.

Ole Jorgen Liodden / Pacific Gull (Larus pacificus) Tasmania. December.

Suzi Eszterhas / Western Gull (Larus occidentalis) portrait, with nesting material in beak, Monterey Bay, California, USA, April

Michael Durham / Western Gull (Larus occidentalis) flock flying over the Oregon coast

Tony Wu / Greater crested tern (Thalasseus bergii) feeding on Sardine, Tonga.

Suzi Eszterhas / Forster's tern (Sterna forsteri) perched on post. Elkhorn Slough, Monterey Bay, California, USA. February.

Jeff Vanuga / Lava gull (Larus fuliginosus) near Dragons Hill, Santa Cruz Island, Galapagos Islands, Ecuador.

David Fleetham / Dusky Gull (Leucophaeus fuliginosus) in flight over Santa Cruz Island. With the population estimated at less than 800, this is one of the rarest gulls in the world. Galapagos Archipelago, Ecuador.

Ernie Janes / Pacific gulls (Larus pacificus) in flight over beach Tasmania, Australia.

Ernie Janes / Pacific gull (Larus pacificus) feeding on beach, Tasmania, Australia.