svalbard rock ptarmigan, lagopus muta hyperborea, with winter plumage, in the snow at svalbard

adaptation adult animal arctic background beak bird camoflage camoflague close cold ecosystem environment europe evolution head hill hunted hyperborea lagopus longyear longyearbyen longyeardalen mountain muta nature nordic north norway outdoors plumage ptarmigan rock sedentary snow soft species spitsbergen subspecies summer svalbard tempelfjorden wild wilderness wildlife winter