Ernie Janes / Silver gull (Chroicocephalus novaehollandiae) on beach Victoria, Tasmania, Australia.

Mark Carwardine / Red-billed gull (Larus novaehollandiae) in flight overhead, Stewart Island, New Zealand, June

Juergen Freund / Silver gull (Chroicocephalus novaehollandiae) flock on beach, Queensland, Australia.

Tui De Roy / Silver / red-billed gull (Chroicocephalus novaehollandiae) nesting, Phillip Island Nature Park, Victoria, Australia, December.

Tui De Roy / Silver / red-billed gull (Chroicocephalus novaehollandiae) calling, Phillip Island Nature Park, Victoria, Australia, December.

Pete Oxford / Hartlaub's gull / King gull, (Chroicocephalus hartlaubii) Hout Bay harbor, Western Cape, South Africa.

Pete Oxford / Hartlaub's gull / King gull, (Chroicocephalus hartlaubii) in harbour. Hout Bay harbor, Western Cape, South Africa.

Ole Jorgen Liodden / Silver Gull (Chroicocephalus novaehollandiae) searching for food. Tasmania. December.

Ole Jorgen Liodden / Silver Gull (Chroicocephalus novaehollandiae) Tasmania.

Jouan & Rius / Silver gull (Chroicocephalus novaehollandiae) in flight, Western Australia

Jouan & Rius / Silver gull (Chroicocephalus novaehollandiae) portrait standing on beach, Namburg National Park, Western Australia

Jouan & Rius / Silver gull (Chroicocephalus novaehollandiae) flying low over coastal shoreline, Western Australia