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

Fabian Fopp / Rock Ptarmigan (Lagopus muta), Grisons, Switzerland

Fergus Gill / 2020VISION / Ptarmigan (Lagopus mutus) hen in summer plumage behind rocks. Cairngorms National Park, Scotland, July.

Erlend Haarberg / Male Rock ptarmigan (Lagopus muta) with a female and others standing in row, Iceland, March

Erlend Haarberg / Rock ptarmigan (Lagopus muta) in snow near glacier, Iceland, August 2010

Erlend Haarberg / Eight Rock ptarmigans (Lagopus muta) with snow blowing in wind, Norway, February

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.

Mark Hamblin / 2020VISION / Rock ptarmigan (Lagopus mutus) close-up portrait in winter plumage, Cairngorms NP, Scotland, UK, February

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

Peter Cairns / 2020VISION / Rock ptarmigan (Lagopus mutus) male hidden by rocks, eye visible, winter plumage, Cairngorm Mountains, Cairngorms NP, Highland, Scotland, UK, February

Markus Varesvuo / Ptarmigan (Lagopus mutus) chick on lichen covered wood. Ivalo, Finland, June. Magic Moments book plate, page 136.

Peter Cairns / 2020VISION / Silhouette of Rock ptarmigan (Lagopus mutus) perched on rock against winter sun, Cairngorms NP, Highlands, Scotland, UK, February