Andy Trowbridge / Red-billed gull (Chroicocephalus scopulinus) standing on beach, portrait. Ashley River, Canterbury, New Zealand. August.

Andy Trowbridge / Red-billed gull (Chroicocephalus scopulinus), portrait. Ashley River, Canterbury, New Zealand. July.

Andy Trowbridge / Red-billed gull (Chroicocephalus scopulinus) perched on rock. Katiki Point, Otago, South Island, New Zealand. January.

Brent Stephenson / Immature Red-billed gull (Larus scopulinus) in its second year, resting on the shore. Waikanae Estuary, Wellington, New Zealand, August.

Brent Stephenson / Red-billed Gull (Chroicocephalus scopulinus) in flight against a blue sky. Off Kaikoura, Canterbury, New Zealand, October.

Brent Stephenson / Red-billed gulls (Chroicocephalus scopulinus) calling and displaying from a rock. Ohau Point, Canterbury, New Zealand, October.

Brent Stephenson / Red-billed Gulls (Chroicocephalus scopulinus), both adults and juveniles, roosting on cliff. Near Kaikoura, Canterbury, New Zealand, October.

Brent Stephenson / Red-billed Gull (Chroicocephalus scopulinus) in flight. Off Kaikoura, Canterbury, New Zealand, October.

Ernie Janes / Red-billed gull (Chroicocephalus scopulinus) watching for prey in sand, New Zealand

Andrew Walmsley / Legs of two Red billed gulls (Chroicocephalus scopulinus) on rock, Akaroa, New Zealand, October

Andrew Walmsley / Two Red billed gulls (Chroicocephalus scopulinus) on rock, Akaroa, New Zealand, October

Andrew Walmsley / Red Billed Gull (Chroicocephalus scopulinus) standing in shallow water calling, Christchurch, New Zealand, May

Andrew Walmsley / Red billed gull (Chroicocephalus scopulinus) calling, Kaikoura, New Zealand, January

Andrew Walmsley / Red billed gull (Chroicocephalus scopulinus) on rock at sunrise, Kaikoura, New Zealand, April

Mark Carwardine / Red-billed gull (Chroicocephalus scopulinus) in flight, Chatham Islands, off southern New Zealand

Tom Marshall / Red-billed gull {Chroicocephalus scopulinus} adult portrait, Christchurch, New Zealand. January

Barry Bland / Red billed gull {Chroicocephalus scopulinus} Aromoana, New Zealand.

Barry Bland / Red billed gull {Chroicocephalus scopulinus} Aromoana, New Zealand.

Mike Potts / Red billed gull {Chroicocephalus scopulinus} adult with small chick, Cape Kiddnappers, North Island, New Zealand

Rod Williams / Red billed gull stretching wing {Chroicocephalus scopulinus} New Zealand

Rod Williams / Red billed gull {Chroicocephalus scopulinus} New Zealand

Barry Bland / Red-billed gull (Chroicocephalus scopulinus) standing in shallow water, New Zealand.

Barry Bland / Red-billed gull (Chroicocephalus scopulinus) walking, Aramoana, New Zealand.

Barry Bland / Red billed gull (Chroicocephalus scopulinus) chick calling, Aramoana, New Zealand.

Barry Bland / Red billed gull (Chroicocephalus scopulinus) calling while in flight, Aramoana, New Zealand.

Barry Bland / Red billed gull (Chroicocephalus scopulinus) in flight, Aramoana, New Zealand.

Barry Bland / Red billed gulls (Chroicocephalus scopulinus) taking off, Aramoana, New Zealand.

Barry Bland / Red billed gulls (Chroicocephalus scopulinus) on rocks, Aramoana, New Zealand.

Barry Bland / Red billed gulls (Chroicocephalus scopulinus) taking off, Aramoana, New Zealand.

Barry Bland / Red billed gulls (Chroicocephalus scopulinus) on the beach, Aramoana, New Zealand.

Barry Bland / Red billed gulls (Chroicocephalus scopulinus), Aramoana, New Zealand.

Barry Bland / Red billed gulls (Chroicocephalus scopulinus) in flight, Aramoana, New Zealand.

Barry Bland / Red billed gulls (Chroicocephalus scopulinus) on water, Aramoana, New Zealand.