Tom Vezo / Acorn Woodpecker (Melanerpes formicivorus) female, Madera Canyon, Arizona

Tom Vezo / Acorn Woodpecker (Melanerpes formicivorus) female bringing food to nest cavity, Madera Canyon, Arizona

Rolf Nussbaumer / Acorn woodpecker {Melanerpes formicovus} Male, Madera Canyon, Arizona, USA.

Mary McDonald / Broad billed hummingbird (Cynanthus latirostris) AZ, USA Madera Canyon, Arizona

Tom Vezo / Mexican Golden Poppy (Eschscholzia glyptosperma) flowers, Madera Canyon, Arizona

David Welling / Spotted Towhee (Pipilo maculatus) male feeding on seeds in madera canyon, Arizona, USA

Luiz Claudio Marigo / Flower of Arum lily / Yautia Madera (Montrichardia / Arum arborescens) in the delta of Parnaa­ba River, Delta do Parnaa­ba Extractivist Reserve, Piaua­ State, Northeastern Brazil.

Luiz Claudio Marigo / Yautia Madera (Montrichardia / Arum arborescens) in the delta of Parnaa­ba River, Delta do Parnaa­ba Extractivist Reserve, Piaua­ State, Northeastern Brazil.

Luiz Claudio Marigo / Flower of Arum lily / Yautia Madera (Montrichardia / Arum arborescens) in the delta of Parnaa­ba River, Delta do Parnaa­ba Extractivist Reserve, Piaua­ State, Northeastern Brazil.

Tim Laman / Long-billed curlew (Numenius americanus) standing by the water's edge. Corte Madera Ecological Preserve, California.

Tim Laman / Clapper rail (Rallus longirostris levipes), Californian subspecies. Corte Madera Marsh, California.

Tim Laman / Clapper rail (Rallus longirostris levipes), Californian subspecies, swimming in the Corte Madera Marsh, California.

Tom Vezo / Acorn Woodpecker (Melanerpes formicivorus) female, Madera Canyon, Arizona

Tom Vezo / Acorn Woodpecker (Melanerpes formicivorus) female, Madera Canyon, Arizona

Tom Vezo / Acorn Woodpecker (Melanerpes formicivorus) male, Madera Canyon, Arizona

Tom Vezo / Broad-billed Hummingbird (Cynanthus latirostris) chicks in nest, Madera Canyon, Arizona

Tim Fitzharris / Rio Grande winding through Madera Canyon, Big Bend Ranch State Park, Chihuahuan Desert, Texas

Tom Vezo / Hepatic Tanager (Piranga flava) male perching, Madera Canyon, Arizona

Tom Vezo / Flame-colored Tanager (Piranga bidentata) male, perched in tree, Madera Canyon, Arizona

David Welling / Broad billed hummingbird {Cynanthus latirostris} female feeding, Madera Canyon, Arizona, USA.

David Welling / Broad billed hummingbird {Cynanthus latirostris} male in flight, Madera Canyon, Arizona, USA

David Welling / Broad billed hummingbird male feeding {Cynanthus latirostris} Madera Canyon, Arizona, USA

Tom Vezo / Broad-billed Hummingbird (Cynanthus latirostris) on nest feeding two chicks, Madera Canyon, Arizona

Tom Vezo / Broad-billed Hummingbird (Cynanthus latirostris) on nest feeding two chicks, Madera Canyon, Arizona

Konrad Wothe / Broad-billed Hummingbird (Cynanthus latirostris) male flying, Madeira Canyon, Coronado National Forest, Arizona

Konrad Wothe / Broad-billed Hummingbird (Cynanthus latirostris) male flying, Madeira Canyon, Coronado National Forest, Arizona

Mary McDonald / Broad billed hummingbird (Cynanthus latirostris) feeding on thistle. Madera Canyon, Arizona, USA

Mary McDonald / Broad billed hummingbird (Cynanthus latirostris) AZ, USA Madera Canyon, Arizona

Mary McDonald / Broad billed hummingbird (Cynanthus latirostris) feeding on thistle. Madera Canyon, Arizona, USA

Mary McDonald / Broad billed hummingbird (Cynanthus latirostris) Madera Canyon, Arizona, USA

Tom Vezo / Mexican jay {Aphelocoma ultramarina} Madera Canyon, Arizona, USA

Tom Vezo / Coppery tailed / Elegant trogon female at nest hole in Sycamore tree {Trogon elegans} Arizona, USA madera canyon

Tom Vezo / American Robin (Turdus migratorius) adult perching on rock, Madera Canyon, Arizona

Fergus Gill / 2020VISION / Female Eider (Somateria mollissima) swimming on sea, Outer Hebrides, Scotland, UK, June.

Mark Hamblin / 2020VISION / Eider (Somateria mollissima) male in flight in evening light. Aberdeenshire, Scotland, UK, March.

Erlend Haarberg / Eider ducks (Somateria mollissima) taking off from water, Norway, January

Ben Hall / Eider (Somateria mollissima) male swimming, Northumberland, UK

Markus Varesvuo / Eider (Somateria molisima) male head profile, Finland May

Bernard Castelein / Common Eider (Somateria mollissima) female with chicks walking up beach from water, Helgoland, Germany, May

Bernard Castelein / Common Eider (Somateria mollissima) chick on beach, Helgoland, Germany, May

Jeff Wilson / View through the porthole of science teams and Frozen Planet film crew working on the sea ice in the Bering Sea, Alaska, USA, March 2008. The film crew were in search of Spectacled eider ducks, temper...

Eric Baccega / King Eider (Somateria spectabilis) flying low over water. Floe edge, Arctic Bay, Nunavut, Canada, April.

Wild Wonders of Europe / O. Haarberg / Eider ducks (Somateria mollissima) on sea, Kallskr, Stockholm Archipelago, Sweden, June 2009

Wild Wonders of Europe / O. Haarberg / Four Eider ducks (Somateria mollissima) flying over sea, Kallskr, Stockholm Archipelago, Sweden, June 2009

Guy Edwardes / Eider (Somateria mollissima) male taking off from water, Seahouses, Northumberland, England, February

Guy Edwardes / Eider (Somateria mollissima) male on water, Seahouses, Northumberland, England, February

Guy Edwardes / Eider (Somateria mollissima) male on water, stretching, Seahouses, Northumberland, England, February

Edwin Giesbers / Two male Eider ducks (Somateria mollissima) Heligoland, Germany

Kim Taylor / Eider (Somateria mollissima) drake, captive, Sussex, England

Orsolya Haarberg / Common eider (Somateria mollissima) male. Jkulsrln glacial lagoon. Iceland. June 2008

Orsolya Haarberg / Common eider (Somateria mollissima) male. Jkulsrln glacial lagoon. Iceland. June 2008

Pete Cairns / Common Eider duck (Somateria mollissima) male taking off from water, Nord-Trondelag, Norway

Richard Steel / 2020VISION / Female Eider (Somateria mollissima) resting on bladderwrack (Fucus) seaweed, Northumburland, England, UK, July.

Richard Steel / 2020VISION / Eider (Somateria mollissima) duckling swimming on sea, Northumberland, England, UK, July.

Fergus Gill / 2020VISION / Female Eider (Somateria mollissima) with chick, Outer Hebrides, Scotland, UK, June.

Fergus Gill / 2020VISION / Female Eider (Somateria mollissima) foraging for food with her chicks, Outer Hebrides, Scotland, UK, June.

Fergus Gill / 2020VISION / Female Eider (Somateria mollissima) standing on shore, Outer Hebrides, Scotland, UK, June.

Fergus Gill / 2020VISION / Female Eider (Somateria mollissima) with chicks, Outer Hebrides, Scotland, UK, June.

Nick Upton / Eiders (Somateria mollissima) three males in eclipse plumage and a female roosting on sandstone shore at high tide, Fife, UK, July.

Nick Upton / Eiders (Somateria mollissima) three female duck roosting on sandstone shore at high tide, Fife, UK, July.

Mark Hamblin / 2020VISION / Eider (Somateria mollissima) pair in spring plumage, Scotland, UK, May. Did you know? Eider ducks can fly at speeds up to 70 miles per hour.

Mark Hamblin / 2020VISION / Male Eider (Somateria mollissima) in spring plumage, displaying, Scotland, UK, May.

Mark Hamblin / 2020VISION / Eider (Somateria mollissima) male in spring plumage, displaying, Scotland, UK, May.

Mark Hamblin / 2020VISION / Male Eider (Somateria mollissima) in spring plumage, displaying, Scotland, UK, May.

Mark Hamblin / 2020VISION / Male Eider (Somateria mollissima) in spring plumage, displaying, Scotland, UK, May.

Mark Hamblin / 2020VISION / Male Eider (Somateria mollissima) in spring plumage, displaying, Scotland, UK, May.

Mark Hamblin / 2020VISION / Male Eider (Somateria mollissima) feeding, spring plumage, Scotland, UK, May.

Mark Hamblin / 2020VISION / Male Eider (Somateria mollissima) in spring plumage discarding a mussel shell as it feeds, Scotland, UK. May.

Markus Varesvuo / Eider (Somateria mollisima) in flight, Uto Finland May . Fascinating birds bookplate.

Mark Carwardine / Adult male King eider duck (Somateria spectabilis) flying over ice, Igloolik, Foxe Basin, Nunavut, Arctic Canada

Robin Chittenden / Eider (Somateria mollissima) female on water, Northumberland, UK, June

Mark Hamblin / 2020VISION / Eider (Somateria mollissima) female in evening light on water. Aberdeenshire, Scotland, UK, March.

Mark Hamblin / 2020VISION / Eider (Somateria mollissima) female in evening light on water. Aberdeenshire, Scotland, UK, March.

Mark Hamblin / 2020VISION / Eider (Somateria mollissima) male on water in evening light. Aberdeenshire, Scotland, UK, March.

Mark Hamblin / 2020VISION / Eider (Somateria mollissima) male in flight in evening light. Aberdeenshire, Scotland, UK, March.

Mark Hamblin / 2020VISION / Eider (Somateria mollissima) male flying over sea in evening light. Aberdeenshire, Scotland, UK, March. Did you know? The collection of eider down has been recorded from the 14th century. However it...

Todd Mintz / King Eider ducks (Somateria spectabilis) group in flight over Arctic ocean, Igloolik, Nunavut, Canada, July

Todd Mintz / King Eider ducks (Somateria spectabilis) group in flight over Arctic ocean, Igloolik, Nunavut, Canada, July

Todd Mintz / King Eider ducks (Somateria spectabilis) group in flight over Arctic ocean, Igloolik, Nunavut, Canada, July

Todd Mintz / King Eider ducks (Somateria spectabilis) group in flight over Arctic ocean, Igloolik, Nunavut, Canada, July

Erlend Haarberg / Five Eider ducks (Somateria mollissima) on water near ice, Iceland, June

Markus Varesvuo / Raft of female Eider ducks (Somateria mollisima) with chicks, Porvoo, Finland, May

Loic Poidevin / Common eider duck (Somateria mollissima) sitting on nest, Farne Island, Northumberland, England.

Roy Mangersnes / King eider (Somateria spectabilis) drake taking off from the sea, Finnmark, Northern Norway, April

Roy Mangersnes / King Eider (Somateria spectabilis) drake resting on ice, Finnmark, Northern Norway, April

Gerrit Vyn / Nest and eggs of Common eider duck (Somateria mollissima) Seward Peninsula, Alaska, USA June

Todd Mintz / King Eider ducks (Somateria spectabilis) group in flight, Baffin Island, Nunavut, Arctic Ocean, July

Markus Varesvuo / Eider (Somateria molisima) male profile portrait, Finland May

Markus Varesvuo / Eider (Somateria molisima) two males on water, Finland May

Markus Varesvuo / Eider (Somateria molisima) male and female pair on water, Finland May

Markus Varesvuo / Eider (Somateria molisima) male profile portrait, Finland May

Markus Varesvuo / Eider (Somateria molisima) male portrait, Finland May

Markus Varesvuo / Eider (Somateria molisima) female portrait, Finland May

Markus Varesvuo / Eider (Somateria mollisima) flock in flight, Falsterbo Sweden October

Markus Varesvuo / Eider (Somateria mollisima) group flying over coastal sea and ice, Finland March

Markus Varesvuo / Eider (Somateria mollisima) flock in flight over coastal ice and sea, Finland March

Markus Varesvuo / Eider (Somateria mollisima) blurred view of two males in flight, Finland March

Markus Varesvuo / Eider (Somateria mollisima) flock flying over sea, Finland March

Markus Varesvuo / Eider (Somateria mollisima) flock in flight above snow, Finland March

Markus Varesvuo / Eider (Somateria molisima) female sitting up in water and flapping wings, Finland May

Markus Varesvuo / Eider (Somateria molisima) male flying above water, Finland May

Markus Varesvuo / Eider (Somateria molisima) three males and one female on water, Finland May

Markus Varesvuo / Eider (Somateria molisima) male calling, Finland May

Markus Varesvuo / Eider (Somateria molisima) male coming into land on water, Finland May

Markus Varesvuo / Eider (Somateria mollisima) male coming into land on water, Finland May

Alan Williams / Two male Eider duck (Somateria mollissima) swimming near shore, North Uist ,Outer Hebrides, Scotland, UK, May

Steven Kazlowski / Eider (Somateria mollissima) eggs in a down feather nest on muddy tundra, found along Kasegaluk lagoon and outside the arctic village of Point Lay, Alaska, USA, June

Andrew Parkinson / Male Eider duck (Somateria mollissima), Farne Islands, UK, June.

Andrew Parkinson / Eider duck (Somateria mollissima) female leads her ducklings towards the sea, Farne Islands, UK, June.

Bernard Castelein / Footprints of Common Eider (Somateria mollissima) on sand, Helgoland, Germany, May

Bernard Castelein / Common Eider (Somateria mollissima) female on beach, Helgoland, Germany, May

Bernard Castelein / Common Eider (Somateria mollissima) female with chicks on water in waves, Helgoland, Germany, May

Bernard Castelein / Common Eider (Somateria mollissima) female with chicks on beach, Helgoland, Germany, May

Bernard Castelein / Common Eider (Somateria mollissima) female with chicks on beach, Helgoland, Germany, May

Jeff Wilson / Common Eider duck (Somateria mollissima) female on nest, Svalbard, Spitzbergen, Norway, July 2009, Taken on location for the BBC series, Frozen Planet.

Jeff Wilson / The Frozen Planet team waiting to board the United States Coastguard Cutter 'Healy' in Dutch Harbour, Alaska, USA, on their way to film Spectacled eider ducks in the Bering Sea, March 2008. Taken on l...

Jeff Wilson / The crew of United States Coastguard Cutter 'Healy' prepare decks in the Bering sea, Alaska, USA. The ship served as a platform for the Frozen Planet crew whilst filming Spectacled eider ducks overwin...

Jeff Wilson / Aerial view of science teams and Frozen Planet film crew working on the sea ice in the Bering Sea, Alaska, USA, March 2008. The film crew were in search of Spectacled eider ducks, temperatures rarely...

Jeff Wilson / Common Eider duck (Somateria mollissima) nesting amongst Purple Saxifage (Saxifraga oppositifolia) on Svalbard, Spitzbergen, Norway July 2009. The down feathers lining the nest are collected and sold...

Jeff Wilson / Newly hatched chicks of Common eider duck (Somateria mollissima) in nest, Svalbard, Spitzbergen, Norway, July 2009. Taken on location for the BBC series, Frozen Planet.

Jeff Wilson / Eggs of Common Eider duck (Somateria mollissima) in down nest on Svalbard, Spitzbergen, Norway, July 2009. The down surrounding the eggs is collected and sold to markets as duck down, Taken on locatio...

Markus Varesvuo / Eider (Somateria mollisima) drake in flight. Finland, March.

Markus Varesvuo / Eider (Somateria mollisima) drakes (black and white) and ducks (brown) in flight. Finland, March.

Bryan and Cherry Alexander / Eider (Somateria mollissima) eggs on down nest, amongst the rocks. Svalbard, Norway, June.

Bryan and Cherry Alexander / Female Eider (Somateria mollissima) on down nest, well camouflaged amongst the rocks. Svalbard, Norway, June.

Brent Stephenson / Female Common Eider (Somateria mollissima) swimming with ducklings. Seydisfjordur, Iceland, June.

Brent Stephenson / Female Common Eider (Somateria mollissima) standing on the shoreline. Siglufjordur, Iceland, July.

Markus Varesvuo / Steller's Eider (Polysticta stelleri) males and females on water. Norway, March. Magic Moments book plate, page 130-131.

Eric Baccega / King Eider (Somateria spectabilis) flying low over water. Floe edge, Arctic Bay, Nunavut, Canada, June.