Ismaele Tortella / Three Rock ptarmigan (Lagopus muta) feeding in winter plumage, city of Tromso in the background, northern Norway, March 2019.

Chris Gomersall / Large flock of Red knot (Calidris canutus) moving at high tide roost, in winter plumage, Snettisham RSPB Reserve, Norfolk, England, UK, September.

Espen Bergersen / Ptarmigans (Lagopus mutus) in white winter plumage, camouflaged against mountain scree with snow, Spitsbergen, Svalbard, Norway, April

Espen Bergersen / Ptarmigans (Lagopus mutus) in white winter plumage, camouflaged against mountain scree with snow, Spitsbergen, Svalbard, Norway, April. Highly commended in the Animals in their Environment Category of...

Markus Varesvuo / Female Black grouse (Tetrao / Lyrurus tetrix) perched in tree covered in snow, Inari Kiilopaa, Finland, January.

Markus Varesvuo / Willow grouse / Ptarmigan (Lagopus lagopus) fluffed up perched in snow, Inari, Finland, February.

Markus Varesvuo / Willow grouse (lagopus lagopus) flock in flight in snow, Utsjoki, Finland, October.

Markus Varesvuo / Willow grouse / Ptarmigan (Lagopus lagopus) flying, Inari Kiilopaa, Finland, February.

Danny Green / White tailed eagle (Haliaeetus albicilla) in flight with snowy background, Rausu, Japan, February

Danny Green / Steller's sea eagle (Haliaeetus pelagicus) on snowy ground, Japan, February

Danny Green / Steller's sea eagle (Haliaeetus pelagicus) close up portrait, Japan, February

Danny Green / Japanese crane (Grus japonensis) displaying, wings in heart shape, Hokkaido, Japan, February

Ole Jorgen Liodden / White-tailed eagle (Haeliaeetus albicilla) perched on snowy snag with wings raised, Flatanger, Norway, January.

Markus Varesvuo / Black grouse (Lyrurus tetrix) mating in snow, Utajarvi, Finland, May.

Markus Varesvuo / Willow grouse (Lagopus lagopus) perched on branch, Kiilopaa, Inari, Finland, January.

Markus Varesvuo / Willow grouse (Lagopus lagopus), Kiilopaa, Inari, Finland, January.

Markus Varesvuo / Willow grouse (Lagopus lagopus), Kiilopaa, Inari, Finland, January.

Markus Varesvuo / Willow grouse (Lagopus lagopus) Kiilopaa, Inari, Finland, January.

George Sanker / Mourning Dove (Zenaida macroura) perched on branch in snow, Acadia National Park, Maine, USA, February.

David Pattyn / Black necked grebe (Podiceps nigricollis) pair performing their courtship dance in the mating season. This early in the breeding season, one of the birds is still in its winter plumage. The Netherland...

David Pattyn / Black necked grebe (Podiceps nigricollis) pair performing their courtship ritual. This early in the breeding season one of the grebes is still in its winter plumage. The Netherlands.April 2014

David Pattyn / Black necked grebe (Podiceps nigricollis) portrait of an adult bird in winter plumage. The Netherlands. April 2014

David Pattyn / Black necked grebe (Podiceps nigricollis) portrait of an adult bird in winter plumage. The Netherlands.April 2014

David Pattyn / Black necked grebe (Podiceps nigricollis) portrait of an adult in winter plumage. The Netherlands.April 2014

David Pattyn / Black necked grebe (Podiceps nigricollis) pair running over the water surface together as a part of their courtship ritual. This early in the breeding season, one of the birds is still in its winter p...

Markus Varesvuo / Willow Grouse (Lagopus lagopus) in flight over snowy landscape, Utsjoki, Finland April

Markus Varesvuo / Steller's Eagle (Haliaeteus pelagicus) flying past snowy mountain peak, Hokkaido, Japan, February

Markus Varesvuo / Red-crowned Crane (Grus japonensis) preening in snow,Hokkaido, Japan, February

Markus Varesvuo / Blakiston's Fish Owl (Ketupa blakistoni) perched, Hokkaido, Japan, February.

Markus Varesvuo / Black Grouse (Tetrao tetrix) female on frosty branches, Kuusamo, Finland April

Ben Cranke / Steller's Sea Eagle (Haliaeetus pelagicus) stood on ice floe, Hokkaido, Japan. February.

Ernie Janes / Black headed gull (Larus ridibundus) in winter plumage, Titchwell RSPB reserve, Norfolk, England, UK, December.

Jussi Murtosaari / Great Grey Owl (Strix nebulosa) diving for prey, southern Finland, April.

Loic Poidevin,Loic Poidevin / Northern Goshawk(Accipiter gentilis) on a branch, Bulgaria, February

Markus Varesvuo,Markus Varesvuo / Willow grouse (Lagopus lagopus) in winter plumage, Utsjoki, Finland, April.

Andy Trowbridge / Male goshawk (Accipiter gentilis) feeding on red fox. Southern Norway, December.

Andrew Parkinson / Black-headed gull (Chroicocephalus ridibundus) adult in winter plumage, taking off at dawn from tranquil lake. (Non-ex) Derbyshire, UK. Highly commended, GDT competition 2012, Nature's studio categor...

Andrew Parkinson / 2020VISION / A male (left) and female Ptarmigan (Lagopus mutus) in winter plumage taking flight from an ice field as a skier passes by, Cairngorms National Park, Scotland, UK, March 2011. 2020VISION Exhibition.

Ingo Arndt / Gentoo Penguin (Pygoscelis papua) preening, Prion Island, South Georgia Island, February

Andy Sands / Mistle Thrush (Turdus viscivorus) in snow. Hertfordshire, England, UK, February.

Chris Gomersall / 2020VISION / Adult Kittiwake (Rissa tridactyla) in winter plumage in flight alongside the pelagic trawler 'Charisma', Shetland Isles, Scotland, UK, October

Chris Gomersall / 2020VISION / Grey plover (Pluvialis squatarola) adult in winter plumage on mudflats, The Wash, Norfolk, England, UK, December

Chris Gomersall / 2020VISION / Black-tailed godwit (Limosa limosa) adult in winter plumage feeding on mudflats, The Wash, Norfolk, England, UK, December

Chris Gomersall / 2020VISION / Black-tailed godwit (Limosa limosa) adult in winter plumage feeding on mudflats, The Wash, Norfolk, England, UK, December

Chris Gomersall / 2020VISION / Sanderling (Calidris alba) in winter plumage feeding on tideline, The Wash, Norfolk, March. Did you know? The Sanderling is the only British wading bird that has no back toe; this gives it a distincti...

Chris Gomersall / 2020VISION / Common redshank (Tringa totanus) in winter plumage, feeding on mudflats, The Wash, Norfolk, England, UK, March

Mark Hamblin / 2020VISION / Group of Rock ptarmigan (Lagopus mutus) in winter plumage with hill walker in background, Cairngorms NP, Scotland, UK, February 2010

Mark Hamblin / 2020VISION / Two Rock ptarmigan (Lagopus mutus) in winter plumage with hill walkers in background, Cairngorms NP, Scotland, UK, February 2010. 2020VISION Book Plate.