Unggas air (Waterfowl)
Bar-headed Goose
Anser indicus
- legendaris
- 75 km/h
- Risiko rendah
Flies twice a year over the roof of the world, clearing Himalayan ridges above 7,000 meters where the air can no longer hold most birds aloft. Built for a sky almost nothing else can breathe.
- Populasi
- No precise current global count published; described only qualitatively. Historical decline from over-hunting, egg collecting, and habitat loss, while the total population "may... be increasing" and the trend is genuinely difficult to assess given the species' huge (>2,500,000 km2) range — likely in the tens of thousands to low hundreds of thousands of individuals.
- Habitat
- High-altitude lakes, rivers, and mountain grasslands (4,000-6,000 m) on the Tibetan-Qinghai Plateau and Central Asian steppe during breeding; wetlands, freshwater marshes, and cultivated agricultural fields at lower elevations in South Asia during winter
- Fakta menarik
- Bar-headed Geese are among the highest-flying birds in the world, crossing the Himalayas non-stop in roughly seven hours on migration thanks to specialized hemoglobin and extra heart capillaries that let them extract oxygen efficiently at altitude — tracking studies show they typically fly below about 5,800 m but have been recorded as high as roughly 6,400 m.
- Sebaran
- Breeds across Central Asia (Tibetan Plateau, Mongolia, Kazakhstan, Kyrgyzstan, Tajikistan, southern Russia); migrates over the Himalayas to winter in South Asia (India — from Assam to Tamil Nadu, Nepal, Bangladesh, Myanmar, Pakistan)
- Makanan
- Herbivorous grazer — short grasses, sedges, roots, and tubers near breeding lakes; shifts to agricultural grains (barley, wheat, rice, corn) on wintering grounds
- Ukuran
- 0,74 m
- Bentang sayap
- 1,5 m
- Masa hidup
- 10 tahun
