Unggas air (Waterfowl)
Canvasback
Aythya valisineria
- tidak umum
- 40 km/h
- Risiko rendah
Sloping forehead, ruby-red eyes, the aristocrat of diving ducks. Once the most prized bird on American hunting tables.
- Populasi
- ~690,000 mature individuals (increasing short-term trend, though long-term trend assessed as roughly stable)
- Habitat
- Breeds on freshwater prairie-pothole lakes, ponds, and marshes with dense emergent vegetation (cattails, bulrushes; often aspen parkland/subarctic river deltas); winters on coastal bays, estuaries, brackish lagoons, and large lakes/rivers
- Fakta menarik
- The canvasback's scientific name valisineria refers to wild celery (Vallisneria americana), its favored winter food, and it is North America's largest diving duck; its English common name comes from early European settlers describing its back as canvas-colored.
- Sebaran
- Breeds across western/central Canada and the northern U.S. (prairie pothole region through Saskatchewan river deltas to Alaska); winters across the U.S. from the Pacific coast and Great Lakes to the mid-Atlantic (Chesapeake Bay), Gulf Coast/Lower Mississippi Alluvial Valley, and into Mexico; extent of occurrence ~10.5M km² (breeding) / ~12.4M km² (non-breeding), with vagrant records in the Caribbean, Pacific, Japan, and South Korea
- Makanan
- Omnivorous diving duck; mainly aquatic vegetation (wild celery/Vallisneria tubers, sago pondweed, seeds, buds, roots) plus mollusks (snails, clams — including Baltic clams where vegetation has declined) and aquatic insect larvae (caddisfly, dragonfly, mayfly nymphs) especially in the breeding season
- Ukuran
- 0,52 m
- Bentang sayap
- 0,84 m
- Masa hidup
- 8 tahun
