svalbard rock ptarmigan, female with summer plumage, svalbard, close up

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