Andrew Walmsley / South Island pied oystercatcher (Haematopus finschi) feeding in shallow water, Christchurch, New Zealand, March

Martin H Smith / Hedgehog (Erinaceus europaeus) eating Oystercatcher eggs on South Uist, Scotland. Introduced to the island in 1974, the hedgehog population has increased dramatically and is causing populations of nes...

Jonathan Harrod / South Island Oystercatcher (Haematopus finschi) group flying, Avon Heathcote Estuary, Christchurch, New Zealand

Jonathan Harrod / South Island Oystercatcher (Haematopus finschi), Christchurch, New Zealand

Mike Read / South island oystercatcher (Haematopus finschi) standing on one leg on shoreline, South Island, New Zealand, December

Flip Nicklin / Magellanic Oystercatcher (Haematopus leucopodus) pair mating, Carcass Island, Falkland Islands

Andrew Walmsley / New Zealand pied oystercatcher (Haematopus finschi) feeding, New Zealand, February

Pete Oxford / Magellanic Oystercatcher (Haematopus leucopodus) sitting on nest, with head tucked under wing. Sea Lion Island. South of mainland east Falkland Island. Falkland Islands

Pete Oxford / American Oystercatcher (Haematopus palliatus) foraging on beach, Santiago Island, Galapagos Islands, Ecuador

Pete Oxford / American Oystercatcher (Haematopus palliatus), Santiago Island, Galapagos Islands, Ecuador

Andrew Walmsley / South Island pied oystercatcher (Haematopus finschi) feeding on a sandy beach, Christchurch, New Zealand, February

Andrew Walmsley / South Island pied oystercatcher (Haematopus finschi) running along beach, Christchurch, New Zealand, February

Andrew Walmsley / South Island pied oystercatcher (Haematopus finschi) at waters edge, Christchurch, New Zealand, February

Andrew Walmsley / South Island pied oystercatcher (Haematopus finschi) walking on sandy beach, Christchurch, New Zealand, May

Andrew Walmsley / South Island pied oystercatchers (Haematopus finschi) at roost on sandy beach, Christchurch, New Zealand, May

Tom Marshall / South Island pied oystercatcher (Haematopus finschi) feeding in short grass, Canterbury, New Zealand

Tom Marshall / South Island pied oystercatcher (Haematopus finschi) feeding in short grass, Canterbury, New Zealand

Pete Oxford / Blackish Oystercatcher (Haematopus ater) on beach, Keppel Island, Falkland Islands

Pete Oxford / Blackish Oystercatcher (Haematopus ater), Keppel Island, Falkland Islands

Pete Oxford / Magellanic Oystercatcher (Haematopus leucopodus), Keppel Island, Falkland Islands

Andrew Walmsley / South Island pied oystercatcher (Haematopus finschi) in flight, Christchurch, South Island, New Zealand, January

Pete Oxford / Magellanic Oystercatcher (Haematopus leucopodus) wading in shallow water, Pebble Island, Falkland Islands

Tim Laman / American oystercatcher (Haematopus palliatus) Bartolome Island, Galapagos Islands.

Luciano Candisani / Magellanic Oystercatcher (Haematopus leucopodus) walking, Steeple Jason Island, Falkland Islands

Mike Potts / Variable Oystercatcher {Haematopus unicolor} Ulva Island, South Island, New Zealand

Tom Vezo / American Oystercatcher (Haematopus palliatus) pair performing courtship display, South Padre Island, Texas

Tom Vezo / American Oystercatcher (Haematopus palliatus) pair performing courtship display while two other adults watch, South Padre Island, Texas

Tom Vezo / American Oystercatcher (Haematopus palliatus) pair performing courtship display, South Padre Island, Texas

Martin H Smith / Hedgehog (Erinaceus europaeus) eating Oystercatcher eggs on South Uist, Scotland. Introduced to the island in 1974, the hedgehog population has increased dramatically and is causing populations of nes...

Tui De Roy / American Oystercatcher (Haematopus palliatus) incubating egg on beach nest, Fernandina Island, Galapagos Islands, Ecuador

Tui De Roy / American Oystercatcher (Haematopus palliatus) feeding on Sea Urchin in tide pool, James Bay, Santiago Island, Galapagos Islands, Ecuador

Tui De Roy / American Oystercatcher (Haematopus palliatus) mother and chick feeding in tide pool area, James Bay, Santiago Island, Galapagos Islands, Ecuador

Pete Oxford / American Oystercatcher (Haematopus palliatus) foraging on beach, Santiago Island, Galapagos Islands, Ecuador