Gyrfalcon / Gerfalke (Falco rusticolus)

Wikipedia: Gyrfalcon Source: OTHER Falco_rusticolus_white_cropped.jpg
Classification: Genus Falcons (Falco); Family Falconidae
This bird appears across the great seas in the following continents: Europe, North America.
General: The gyrfalcon (/ˈdʒɜːrfɔːlkən/ or /ˈdʒɜːrfælkən/) (Falco rusticolus), the largest of the falcon species, is a bird of prey. The abbreviation gyr is also used.^[2] It breeds on Arctic coasts and tundra, and the islands of northern North America and the Eurosiberian region. It is mainly a resident there also, but some gyrfalcons disperse more widely after the breeding season, or in winter. Individual vagrancy can take birds for long distances. Its plumage varies with location, with birds being coloured from all-white to dark brown. These colour variations are called morphs. Like other falcons, it shows sexual dimorphism, with the female much larger than the male. For centuries, the gyrfalcon has been valued as a hunting bird. Typical prey includes the ptarmigan and waterfowl, which it may take in flight; it also takes fish and mammals. [more]
Vocalization: A coarse, drawn out, Peregrine-like "kaaawt", with emphasis on ending, is repeated in series. Much slower paced than in small falcons, and deeper and with different attack than in Peregrine. [Link]
Calls: Also shorter, coarse warning-calls. [Link]
Physical details: length=50-60 cm, wingspan=130-160 cm, weight=805-2100 g

🔍 No documented observation