Two Ptarmigan (Lagopus mutus) in white winter plumage at the top of a mountain ridge. Cairngorm Mountains, Scotland, UK. February.  (non-ex), BIRDS,GALLIFORMES,GAME BIRDS,GROUSE,LANDSCAPES,MALES,MOUNTAINS,NP,SCOTLAND,SNOW,UK,VERTEBRATES,VERTICAL,WINTER,National Park,Europe,United Kingdom, Andrew Parkinson