SCOTLAND: The Big Picture / Two male Black grouse (Tetrao tetrix) displaying at a lek, Cairngorms National Park, Scotland, UK, April.

David Woodfall / Black Grouse (Tetrao tetrix) male displaying at lek in snow, Ruabon Moor, Denbighshire, Wales, UK, April

David Woodfall / Black Grouse (Tetrao tetrix) male displaying at lek in snow, Ruabon Moor, Denbighshire, Wales, UK, April

David Tipling / Aerial image showing patchwork pattern where moor has been burnt on rotation for maximising habitat to breed Red Grouse for driven grouse shooting. Grinton Moor above Swaledale, Yorkshire Dales, Engla...

David Tipling / Aerial image showing patchwork pattern where moor has been burnt on rotation for maximising habitat to breed Red Grouse for driven grouse shooting. Grinton Moor above Swaledale, Yorkshire Dales, Engla...

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

Andy Sands / Blanket Bog on upland grouse moor, Upper Teesdale, Co Durham, England, UK, June

Andy Sands / Blanket Bog on upland grouse moor, Upper Teesdale, Co Durham, England, UK, June

Andy Sands / Blanket Bog on upland grouse moor, Upper Teesdale, Co Durham, England, UK, June

Andy Sands / Merlin (Falco columbarius) five chicks in nest among heather on grouse moor at two days old, Upper Teesdale, Co Durham, England, UK, June

David Woodfall / Black grouse (Tetrao tetrix) male displaying at lek in snow, Ruabon Moor, Denbighshire, Wales, UK, April