David Tipling / Red grouse (Lagopus lagopus) male in flight over Heather. Grinton Moor, above Swaledale, Yorkshire Dales National Park, England, UK. July.

David Tipling / Red grouse (Lagopus lagopus) male in flight. Grinton Moor, above Swaledale, Yorkshire Dales National Park, England, UK. July.

Markus Varesvuo / Goshawk (Accipiter gentilis) plucking a Willow Grouse (Lagopus lagopus) Liminka, Finland, March.

Markus Varesvuo / Willow grouse / Ptarmigan (Lagopus lagopus) pecking twig, Utsjoki, Finland, April.

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 / Male Willow grouse / Ptarmigan (Lagopus lagopus) portrait, Inari Kiilopaa, Finland, February.

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

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.

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

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

Ben Hall,Ben Hall / Red grouse (Lagopus lagopus scotica) sitting in flowering heather, Peak District, UK, September

Sergey Gorshkov / Willow grouse / ptarmigan (Lagopus lagopus) pair in flight, Agapa River, Taimyr Peninsula, Siberia, Russia

Gerrit Vyn / Willow Ptarmigan (Lagopus lagopus) male standing on snow covered ground, vocalising in spring courtship. Males retain the white body plumage of winter plumage and molt the head and neck feathers to th...

Donald M. Jones / Willow Ptarmigan (Lagopus lagopus) trio in fall, transitioning to winter plummage, central Alaska

Mark Raycroft / Willow Ptarmigan (Lagopus lagopus) camouflaged on autumn tundra

Glenn Bartley / Willow Ptarmigan (Lagopus lagopus) male, Manitoba, Canada

Michael Quinton / Willow Ptarmigan (Lagopus lagopus) with fall plumage perching on branch, Alaska

Michael Quinton / Willow Ptarmigan (Lagopus lagopus) in winter plumage, Alaska

Michael Quinton / Willow Ptarmigan (Lagopus lagopus) with camouflaged winter plumage in snow burrow, Alaska

Oscar Dewhurst / Red grouse (Lagopus lagopus scoticus) male on stone wall. Durham, UK. April

Oscar Dewhurst / Red grouse (Lagopus lagopus scoticus) male on stone wall. Durham, UK. April

David Tipling / Red grouse (Lagopus lagopus scotica) female amongst flowering heather on Lochindorb grouse moor, Speyside Scotland September

David Tipling / Red grouse (Lagopus lagopus scotica) male amongst flowering heather on Lochindorb grouse moor, Speyside Scotland September

David Tipling / Red grouse (Lagopus lagopus) male in flight. Grinton Moor, above Swaledale, Yorkshire Dales National Park, England, UK. July.

David Tipling / Red grouse (Lagopus lagopus) male in flight over grouse moor. Grinton Moor, above Swaledale, Yorkshire Dales National Park, England, UK. July.

David Tipling / Red grouse (Lagopus lagopus) male in flight over Heather. Grinton Moor, above Swaledale, Yorkshire Dales National Park, England, UK. July.

David Tipling / Red grouse (Lagopus lagopus) male in flight. Grinton Moor, above Swaledale, Yorkshire Dales National Park, England, UK. July.

David Tipling / Red grouse (Lagopus lagopus) male in flight. Grinton Moor, above Swaledale, Yorkshire Dales National Park, England, UK. July.

David Tipling / Red grouse (Lagopus lagopus) male in burnt Heather on grouse moor. Grinton Moor, above Swaledale, Yorkshire Dales National Park, England, UK. July.

David Tipling / Red grouse (Lagopus lagopus) male in burnt Heather on grouse moor, portrait. Grinton Moor, above Swaledale, Yorkshire Dales National Park, England, UK. July.

David Tipling / Red grouse (Lagopus lagopus) female amongst flowering Heather. Grinton Moor, above Swaledale, Yorkshire Dales National Park, England, UK. July.

David Tipling / Red grouse (Lagopus lagopus) female, portrait. Grinton Moor, above Swaledale, Yorkshire Dales National Park, England, UK. July.

Danny Green / Willow Grouse (Lagopus lagopus) portrait. Denali National Park, Alaska, September.

Guy Edwardes / Red Grouse (Lagopus lagopus) on dry stone wall, Yorkshire Dales National Park, England, UK, May.

Guy Edwardes / Red Grouse (Lagopus lagopus) Yorkshire Dales National Park, Yorkshire, England, UK, July.

Markus Varesvuo / Goshawk (Accipiter gentilis) plucking a Willow Grouse (Lagopus lagopus) Liminka, Finland, March.

Markus Varesvuo / Willow Grouse (Lagopus lagopus) Inari Kiilopää Finland, November.

Markus Varesvuo / Wilow Grouse (Lagopus lagopus) making a snow cave. Utsjoki Finland, February.

Markus Varesvuo / Willow Grouse (Lagopus lagopus) in snow cave, Utsjoki, Finland, February.

Staffan Widstrand / Willow ptarmigan (Lagopus lagopus) Boreal Taiga forests, Ovre Pasvik National Park, Norway

Mike Read / Red grouse (Lagopus lagopus scoticus) female feeding on heather moorland, near Lochindorb, Highland Region, Scotland, UK, May.

SCOTLAND: The Big Picture / Red grouse, (Lagopus lagopus scoticus), close-up of adult male in spring plumage, Scotland, UK, February.

SCOTLAND: The Big Picture / Red grouse, (Lagopus lagopus scoticus), adult with two juveniles on flowering heather moor in summer,Scotland, UK, August.

SCOTLAND: The Big Picture / Red Grouse (Lagopus lagopus scoticus) adult male on heather moor in falling snow, Scotland, UK.March