Rob Drummond / Silver Gull (Larus novaehollandiae) flying, Victoria, Australia

Gary Bell/ Oceanwide / Silver Gull (Larus novaehollandiae), Heron Island, Great Barrier Reef, Queensland, Australia

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.

Rob Drummond / Silver Gull (Larus novaehollandiae), Victoria, 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.

Greg Oakley / Silver Gull (Larus novaehollandiae) with fish prey, Victoria, Australia

Simon Bennett / Silver Gull (Larus novaehollandiae), New South Wales, Australia

Rob Drummond / Silver Gull (Larus novaehollandiae), Victoria, Australia

Jan Wegener / Silver Gull (Larus novaehollandiae), Melbourne, Australia

Mark MacEwen / Silver Gull (Larus novaehollandiae forsteri) on Heron Island, southern Great Barrier Reef, Queensland, Australia.

Mark MacEwen / Sign with Silver Gulls (Larus novaehollandiae forsteri) on Heron Island, southern Great Barrier Reef, Queensland, Australia..

Martin Willis / Hooded Plover (Thinornis rubricollis) displaying at Silver Gull (Larus novaehollandiae), Wilsons Promontory National Park, Victoria, Australia

Pete Oxford / Silver Gull (Larus novaehollandiae) on beach, North Stradbroke Island, Australia

Pete Oxford / Silver Gull (Larus novaehollandiae) feeding on fish, North Stradbroke Island, Australia

Pete Oxford / Silver Gull (Larus novaehollandiae) flying, North Stradbroke Island, Australia

Mitsuaki Iwago / Silver Gull (Larus novaehollandiae) affectionate pair, Australia

Tui De Roy / Silver Gull (Larus novaehollandiae) pair, Kaikoura Coast, South Island, New Zealand

Mitsuaki Iwago / Silver Gull (Larus novaehollandiae) feeding on a baby Green Sea Turtle (Chelonia mydas) at sunset, Australia

Gary Bell/ Oceanwide / Silver Gull (Larus novaehollandiae) newborn chicks, Heron Island, Great Barrier Reef, Queensland, Australia

Gary Bell/ Oceanwide / Silver Gull (Larus novaehollandiae) preening, Heron Island, Great Barrier Reef, Queensland, Australia

Barry Bland / Red billed / Silver gulls (Larus novaehollandiae) in flight, Aramoana, New Zealand.

Barry Bland / Red billed / Silver gulls (Larus novaehollandiae) taking off, Aramoana, New Zealand.

Barry Bland / Red billed / Silver gull (Larus novaehollandiae) calling while in flight, Aramoana, New Zealand.

Barry Bland / Red billed / Silver gulls (Larus novaehollandiae) on the beach, Aramoana, New Zealand.

Barry Bland / Red billed / Silver gulls (Larus novaehollandiae), Aramoana, New Zealand.

Barry Bland / Red billed / Silver gulls (Larus novaehollandiae) on water, Aramoana, New Zealand.

Barry Bland / Red billed / Silver gull (Larus novaehollandiae) in flight, Aramoana, New Zealand.

Doug Gimesy / Silver gull (Chroicocephalus novaehollandiae) juvenile, standing on sea wall, Port Philip Bay, Sandringham, Victoria, Australia.

Doug Gimesy / Silver gull (Chroicocephalus novaehollandiae) in flight, Port Philip Bay, Sandringham, Victoria, Australia.

Doug Gimesy / Silver gull (Chroicocephalus novaehollandiae) juvenile, feeding on mussels on intertidal rocks, Port Philip Bay, Sandringham, Victoria, Australia.

Doug Gimesy / Silver gull (Chroicocephalus novaehollandiae) head portrait, Port Philip Bay, Sandringham, Victoria, Australia.

Doug Gimesy / Silver gull (Chroicocephalus novaehollandiae) head portrait, Port Philip Bay, Sandringham, Victoria, Australia.

Doug Gimesy / Silver gull (Chroicocephalus novaehollandiae) perched on wooden fence, Port Philip Bay, Sandringham, Victoria, Australia.

Doug Gimesy / Portrait of Australian pelican (Pelecanus conspicillatus) standing in intertidal zone, Silver gulls (Chroicocephalus novaehollandiae) in background, Victoria, Australia.

Doug Gimesy / Juvenile Pacific gull (Larus pacificus) on the intertidal zone rocks with two Silver gulls (Chroicocephalus novaehollandiae) in background, Sandringham, Victoria, Australia.

Doug Gimesy / Red-billed gull (Larus novaehollandiae) perching on a 'Dog control' beach sign, Brighton, Victoria, Australia.

Enrique Lopez-Tapia / Silver gull (Chroicocephalus novaehollandiae), portrait. Phillip Island, Victoria, Australia. September.

Enrique Lopez-Tapia / Silver gull (Chroicocephalus novaehollandiae) pair mating. Phillip Island, Victoria, Australia. September.

Enrique Lopez-Tapia / Silver gull (Chroicocephalus novaehollandiae) pair in courtship. Phillip Island, Victoria, Australia. September.

Enrique Lopez-Tapia / Silver gull (Chroicocephalus novaehollandiae). Phillip Island, Victoria, Australia. September.

Doug Gimesy / Silver gull (Chroicocephalus novaehollandiae) on a beach concrete breakwater. Beaumaris, Victoria, Australia. May.