svalbard rock ptarmigan, female with summer plumage, lying on ground in summer, svalbard

adaptation adult arctic background bird camoflage camoflague cold ecosystem environment europe evolution female gruvefjellet hunted hunting lagopus longyear longyearbyen longyeardalen lying mountain muta nature nordic north norway outdoors plumage ptarmigan rock sedentary soft species spitsbergen subspecies summer svalbard wild wilderness wildlife winter