Ole Jorgen Liodden / Tasmanian Native hen (Gallinula mortierii) endemic bird of Tasmania. Bruny Island, Tasmania.

Tui De Roy / Great frigatebird (Fregata minor) male guarding single chick. Punta Cevallos, Espanola Island, Galapagos, Ecuador, May.

Tui De Roy / Great frigatebird (Fregata minor) male taking flight at dusk. Espanola Island, Galapagos, Ecuador, May.

Tui De Roy / Magnificent frigatebirds (Fregata magnificens) in low flight ovehead. Espanola Island, Galapagos, Ecuador, December.

Bertie Gregory / 2020VISION / Avocet (Recurvirostra avosetta) silhouetted as its feeds at sunrise, Brownsea Island, Dorset, winter.

Chien Lee / Standardwing (Semioptera wallacii) male displaying at lek, Halmahera Island, North Maluku, Indonesia

Steve Gettle / Ring-necked Duck (Aythya collaris) male flying, Island Lake Recreation Area, Michigan

Ingo Arndt / King Penguin (Aptenodytes patagonicus) group returning from the sea, Volunteer Point, Falkland Islands

Angelo Gandolfi / Carrion Crows (Corvus corone) mobbing a Bearded vulture (Gypaetus barbatus) Scala di St. Regina gorges. Corte, Parc Naturel Regional de Corse, Corsica island, France, January

Angelo Gandolfi / Bearded vulture (Gypaetus barbatus) in flight over rocky outcrops, Monte Incudine, Parc Naturel Regional de Corse, Corsica island, France, February

Suzi Eszterhas / Adelie Penguin (Pygoscelis adeliae) group diving off iceberg, Paulet Island, Antarctica

Suzi Eszterhas / Black-browed Albatross (Thalassarche melanophrys) flying, Steeple Jason Island, Falkland Islands

Hugh Pearson / BBC Producer, Hugh Pearson, recording sound of Cape gannets (Morus capensis) Bird Island, off the coast of the Eastern Cape, South Africa, January

Pete Oxford / Black-browed Albatross (Thalassarche melanophrys) with chick, Saunders Island, Falkland Islands

Pete Oxford / Black-browed Albatross (Thalassarche melanophrys) with chick, Saunders Island, Falkland Islands

Pete Oxford / Black-browed Albatross (Thalassarche melanophrys) with chick on pedestal nest, Saunders Island, Falkland Islands

Pete Oxford / Gentoo Penguin (Pygoscelis papua) chick begging for food from parent, Saunders Island, Falkland Islands

Pete Oxford / Black-browed Albatross (Thalassarche melanophrys) running to take flight, Steeple Jason Island, Falkland Islands

Pete Oxford / Black-browed Albatross (Thalassarche melanophrys) pair courting, Steeple Jason Island, Falkland Islands

Pete Oxford / Black-browed Albatross (Thalassarche melanophrys) pair courting, Steeple Jason Island, Falkland Islands

Pete Oxford / Black-browed Albatross (Thalassarche melanophrys) nesting colony, Steeple Jason Island, Falkland Islands

Pete Oxford / Black-browed Albatross (Thalassarche melanophrys) nesting colony, Steeple Jason Island, Falkland Islands

Pete Oxford / Black-browed Albatross (Thalassarche melanophrys) on pedestal nest, Steeple Jason Island, Falkland Islands

Pete Oxford / Black-browed Albatross (Thalassarche melanophrys) on nest, Keppel Island, Falkland Islands

Pete Oxford / Black-browed Albatross (Thalassarche melanophrys) on pedestal nest, Keppel Island, Falkland Islands

Pete Oxford / Black-browed Albatross (Thalassarche melanophrys) on pedestal nest, Keppel Island, Falkland Islands

Pete Oxford / Black-browed Albatross (Thalassarche melanophrys) eye, Keppel Island, Falkland Islands

Pete Oxford / Black-browed Albatross (Thalassarche melanophrys) on pedestal nest, Keppel Island, Falkland Islands

Pete Oxford / Black-browed Albatross (Thalassarche melanophrys) pair, Keppel Island, Falkland Islands

Tim Laman / Wilson's Bird of Paradise (Cicinnurus respublica) male and two females in display court, Batanta Island, Papua, Indonesia. Near-threatened.

Tim Laman / Red Bird of Paradise (Paradisaea rubra) adult male at lek display site in the top of a canopy tree. Batanta Island, Papua, Indonesia. Near-threatened.

Tim Laman / Goldie's Bird of Paradise (Paradisaea decora) male perched, Fergusson Island, Milne Bay Province, Papua New Guinea. Near-theatened

Tim Laman / Wallace's Standardwing Bird of Paradise (Semioptera wallacei) male calling at display site in rainforest canopy, Kali Batu Putih, Halmahera Island, North Moluccas, Indonesia.

Tim Laman / Goldie's Bird of Paradise (Paradisaea decora) male displaying to female at lek, Fergusson Island, Milne Bay Province, Papua New Guinea. Near-threatened.

Tim Laman / Wallace's Standardwing Bird of Paradise (Semioptera wallacei) male at display site in the rainforest canopy, Kali Batu Putih, Halmahera Island, North Moluccas, Indonesia.

Tim Laman / Wilson's Bird of Paradise (Cicinnurus respublica) male, Batanta Island, Papua, Indonesia, Near-threatened.

Tim Laman / Goldie's Bird of Paradise (Paradisaea decora) displaying to female, Fergusson Island, Milne Bay Province, Papua New Guinea.

Tim Laman / Red Bird of Paradise (Paradisaea rubra) adult male at lek display site in the top of a canopy tree. Batanta Island, Papua, Indonesia.

Pete Oxford / Rockhopper Penguin (Eudyptes chrysocome) trio, Pebble Island, Falkland Islands

Pete Oxford / Rockhopper Penguin (Eudyptes chrysocome) jumping, Pebble Island, Falkland Islands

Pete Oxford / Waved Albatross (Phoebastria irrorata), Hood Island, Galapagos Islands, Ecuador

Jan Vermeer / Emperor Penguin (Aptenodytes forsteri) chick pair, Snow Hill Island, Antarctica

Jan Vermeer / Emperor Penguin (Aptenodytes forsteri) chicks, Snow Hill Island, Antarctica

Tui De Roy / Campbell Albatross (Thalassarche impavida) immature flying, North Cape, Campbell Island, sub-Antarctica New Zealand

Tui De Roy / Campbell Albatross (Thalassarche impavida) parent guarding chick, North Cape, Campbell Island, sub-Antarctica New Zealand

Norbert Wu / Gentoo Penguin (Pygoscelis papua) pair, Cuverville Island, Antarctica Peninsula, Antarctica

Tui De Roy / Rockhopper Penguin (Eudyptes chrysocome) trio on rock, Nightingale Island, South Atlantic

Tui De Roy / Rockhopper Penguin (Eudyptes chrysocome) portrait, Gough Island, South Atlantic

Tui De Roy / Rockhopper Penguin (Eudyptes chrysocome) portrait, Gough Island, South Atlantic

Tui De Roy / Rockhopper Penguin (Eudyptes chrysocome) portrait, Gough Island, South Atlantic

Luciano Candisani / King Penguin (Aptenodytes patagonicus) couple courting, Volunteer Point, East Falkland Island, Falkland Islands

Luciano Candisani / King Penguin (Aptenodytes patagonicus) group on beach, Volunteer Point, East Falkland Island, Falkland Islands

Luciano Candisani / Black-browed Albatross (Thalassarche melanophrys) portrait, Steeple Jason Island, Falkland Islands

Luciano Candisani / Black-browed Albatross (Thalassarche melanophrys) flying, Steeple Jason Island, Falkland Islands

Luciano Candisani / Black-browed Albatross (Thalassarche melanophrys) chick begging parent for food, Saunders Island, Falkland Islands

Yva Momatiuk & John Eastcott / Gentoo Penguin (Pygoscelis papua) parent huddling with two chicks, Booth Island, Antarctica

Yva Momatiuk & John Eastcott / Black-browed Albatross (Thalassarche melanophrys) chick, New Island, Falkland Islands

Yva Momatiuk & John Eastcott / Black-browed Albatross (Thalassarche melanophrys) chick, New Island, Falkland Islands

Thomas Mangelsen / King Penguin (Aptenodytes patagonicus) group of downy chicks, Fortuna Bay, South Georgia

Suzi Eszterhas / Rockhopper Penguin (Eudyptes chrysocome) hopping from rock to rock, New Island, Falkland Islands

Suzi Eszterhas / Adelie Penguin (Pygoscelis adeliae) standing on iceberg, Paulet Island, Antarctica

Suzi Eszterhas / Adelie Penguin (Pygoscelis adeliae) on edge of iceberg, Paulet Island, Antarctica

Suzi Eszterhas / Adelie Penguin (Pygoscelis adeliae) group diving off iceberg, Paulet Island, Antarctica

Suzi Eszterhas / Black-browed Albatross (Thalassarche melanophrys) flying, endangered, Steeple Jason, Falkland Islands

Suzi Eszterhas / Adelie Penguin (Pygoscelis adeliae) group jumping off iceberg into icy water, Paulet Island, Antarctica

Suzi Eszterhas / Adelie Penguin (Pygoscelis adeliae) trio diving off iceberg, Paulet Island, Antarctica

Suzi Eszterhas / Adelie Penguin (Pygoscelis adeliae) on iceberg, Paulet Island, Antarctica

Suzi Eszterhas / Bald Eagle (Haliaeetus leucocephalus) flying, Amaknak Island, Alaska

Yva Momatiuk & John Eastcott / King Penguin (Aptenodytes patagonicus) rookery, fall, St Andrews Bay, South Georgia Island, Southern Ocean, Antarctic Convergance

Yva Momatiuk & John Eastcott / Gentoo Penguin (Pygoscelis papua) chick begging parent for food, on beach, fall, Gold Harbour, South Georgia Island, Southern Ocean, Antarctic Convergence

Yva Momatiuk & John Eastcott / Gentoo Penguin (Pygoscelis papua) flapping wings and walking on beach in surf, evening, Cooper Bay, South Georgia Island, Southern Ocean, Antarctic Convergence

Yva Momatiuk & John Eastcott / King Penguin (Aptenodytes patagonicus) group walking, pointing long bills on gravel beach, fall, Gold Harbour, South Georgia, Southern Ocean, Antarctic Convergence

Yva Momatiuk & John Eastcott / King Penguin (Aptenodytes patagonicus) walking in shallow surf near shore in evening, fall, Gold Harbour, South Georgia Island, Southern Ocean, Antarctic Convergence

Yva Momatiuk & John Eastcott / Macaroni Penguin (Eudyptes chrysolophus) adults walking and one jumping on boulder, along rocky river bank near sea, Cumberland Bay, Southern Ocean, Antarctic Convergance, South Georgia Island

Christian Ziegler / Broad-billed Motmot (Electron platyrhynchum) portrait, Barro Colorado Island, Panama

Tui De Roy / Blue-footed Booby (Sula nebouxii) pair performing courtship dance, Hood Island, Galapagos Islands, Ecuador

Tui De Roy / Blue-footed Booby (Sula nebouxii) pair performing courtship dance, Hood Island, Galapagos Islands, Ecuador

Tui De Roy / Waved Albatross (Phoebastria irrorata) courtship dance under rainy season clouds, Punta Cevallos, Espanola Island, Galapagos Islands, Ecuador

Andrew Parkinson / Wave breaking on coast of Bird Island, Lamberts Bay, South Africa

Flip de Nooyer / Black-browed Albatross (Thalassarche melanophrys) chicks on tower nests, South Georgia Island

Tui De Roy / Erect-crested Penguin (Eudyptes sciateri) pair, Antipodes Island, New Zealand

Tui De Roy / Erect-crested Penguin (Eudyptes sciateri) close-up portrait, restricted to Proclamation Island, Bounty Islands, New Zealand

Tui De Roy / Salvin's Albatross (Thalassarche salvini) returning en masse to crowded nesting colony at sunset, Proclamation Island, Bounty Islands, New Zealand

Tui De Roy / Salvin's Albatross (Thalassarche salvini) returning to crowded nesting colony at sunset, Proclamation Island, Bounty Islands, New Zealand

Patricio Robles Gil / Blue-footed Booby (Sula nebouxii) perched on rocks and cactus on San Pedro Martir Island, Gulf of California, Mexico

Mitsuaki Iwago / Cape Barren Goose (Cereopsis novaehollandiae) mother foraging with gosling, Kangaroo Island, Australia

Tom Vezo / Piping Plover (Charadrius melodus) sitting on eggs in nest on ground, Long Island, New York

Thomas Mangelsen / White Ibis (Eudocimus albus) trio feeding at sunset, Ding Darling National Wildlife Refuge, Sanibel Island, Florida

Mark Moffett / Large Ground Finch (Geospiza magnirostris) endemic species, extra large bill for cracking large seeds, largest of Darwin's 13 Finches, Santiago Island, Galapagos Islands, Ecuador

Tom Vezo / Black-capped Chickadee (Poecile atricapillus) in Bayberry bush, Long Island, New York

Tom Vezo / Scarlet Tanager (Piranga olivacea) male perched in tree, Long Island, New York

Tom Vezo / Baltimore Oriole (Icterus galbula) female on perch, Long Island, New York

Konrad Wothe / Royal Penguin (Eudyptes schlegeli) pair, Macquarie Island, Australia

Yva Momatiuk & John Eastcott / Black-bellied Plover (Pluvialis squatarola) non-breeding bird resting on one leg on shore, spring, Gulf of Mexico, Padre Island National Seashore, Texas

Gordon Court / Adelie Penguin (Pygoscelis adeliae) gives a warning call when under threat, Cape Bird, Ross Island, Antarctica

Colin Monteath / Adelie Penguin (Pygoscelis adeliae) group on iceberg, Paulet Island, Antarctica