Unggas air (Waterfowl)
Steller's Eider
Polysticta stelleri
- tidak umum
- 40 km/h
- Rentan
Smallest eider, named for the same naturalist as Steller's Jay. Disappeared from Alaska's North Slope and is barely hanging on.
- Populasi
- ~110,000–150,000 individuals, decreasing
- Habitat
- Nests on marshy Arctic and sub-Arctic coastal tundra (dominated by water sedge and pendant grass) near lakes and ponds; non-breeding season spent in coastal bays, lagoons, and shallow nearshore marine waters
- Fakta menarik
- Ringing studies show Steller's Eiders can live over 21 years (21 years, 4 months is the documented ringing-derived longevity record) — a striking figure for a species that undertakes long transcontinental migrations between Russian and Alaskan breeding populations.
- Sebaran
- Breeds along the Russian Arctic coast from the Yamal Peninsula to the Kolyma Delta and on Alaska's Arctic coastal plain (e.g., Utqiagvik); Russian-Atlantic birds winter in the Barents Sea/Novaya Zemlya, northern Norway, and Baltic Sea, while Russian-Pacific and Alaska-breeding birds winter in the Bering Sea, southwest Alaska, Alaska Peninsula, Aleutian Islands, and northern Japan
- Makanan
- Crustaceans, mollusks, echinoderms, and polychaete worms taken by diving (to ~9 m) and dabbling in winter; aquatic insect larvae, seeds, and plant matter (e.g., crowberries, pondweeds) on the breeding tundra
- Ukuran
- 0,45 m
- Bentang sayap
- 0,72 m
- Masa hidup
- 10 tahun
