Unggas air (Waterfowl)
Greater Scaup
Aythya marila
- tidak umum
- 40 km/h
- Risiko rendah
Slightly bigger, slightly rounder, slightly farther north. The same duck after a thyroid test.
- Populasi
- approx. 4.9–5.2 million mature individuals globally (decreasing trend since the 1980s)
- Habitat
- Breeds on small, shallow freshwater lakes, pools, and rivers with grassy/marshy shorelines in Arctic tundra and moorland; winters on coastal waters less than 10 m deep, sheltered bays, estuaries, and inland lakes/reservoirs (e.g. the Great Lakes)
- Fakta menarik
- The Greater Scaup is the only truly circumpolar diving duck species; the oldest known banded individual was ringed in 1988 and recaptured in 2007, indicating a lifespan of at least 20 years.
- Sebaran
- Circumpolar breeding distribution within the Arctic Circle across Iceland, Scandinavia, northern Russia/Siberia, the Aleutians, Alaska, and northern Canada; winters along coasts of Europe (incl. Adriatic and Black Seas), eastern Asia (to southeast China), and North America (Pacific coast, Great Lakes, Atlantic coast to Florida)
- Makanan
- Primarily aquatic molluscs, aquatic plants, and insects/invertebrates obtained by diving to depths of 0.5–6 m (exceptionally to 10 m); crustaceans and other invertebrates in summer, seeds/leaves/stems/roots of aquatic vegetation in freshwater habitats
- Ukuran
- 0,475 m
- Bentang sayap
- 0,775 m
- Masa hidup
- 8 tahun
