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

adaptation adult animal arctic background beak behavior bird camoflage camoflague close cold dig ecosystem environment evolution food habitat head hill hunted hyperborea lagopus longyear mountain muta nature nordic north norway outdoors plant plumage ptarmigan rock search searching snow species spitsbergen spring subspecies svalbard tempelfjorden vegetation wild wilderness wildlife winter