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

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