Andean Goose
Oressochen melanopterus
This chunky white-and-black goose is often common and conspicuous on Andean bogs and lakeshores; usually in pairs or small groups and can be confiding in areas where not hunted. Note the small pink bill and pink legs; sexes alike but the male is larger. Local overlap in Andes of central Chile with Upland Goose. Male Upland Geese have a black bill and legs, and dark barring on body. Like the other species in this genus, males give high wheezy whistles whereas females grunt and bray.
识别特征
The Andean goose is 70 to 76 cm (28 to 30 in) long and weighs 2.73 and 3.64 kg (6.0 and 8.0 lb). Both sexes have the same plumage. Adults' heads and bodies are white. Some scapulars have sooty centers and others are dark brown, giving a striped appearance to the shoulders. The wing's primaries and the tail are black with a greenish gloss. Their bill is coral red with a black nail and the legs and feet are light red. Downy young are mostly white with some blackish spots and streaks. Older immatures are similar to adults but duller. Their bodies are somewhat off-white, the sides of the head often partly gray, and the scapulars brownish gray.
分类信息
The Andean goose's taxonomy is unsettled. The International Ornithological Committee (IOC) and BirdLife International's Handbook of the Birds of the World (HBW) place it in genus Chloephaga with several other geese. However, based on a molecular phylogenetic study published in 2014, the South American Classification Committee of the American Ornithological Society and the Clements taxonomy place it and the Orinoco goose in the resurrected genus Oressochen. The IOC and HBW place the Orinoco goose in genus Neochen.<p>The Andean goose is monotypic.
- 学名
- Oressochen melanopterus
- 命名信息
- (Eyton, 1838)
- 目
- Anseriformes
- 科
- Anatidae
- 属
- Oressochen
分布与栖息地
The Andean goose is found from Peru's departments of Ancash and Junín south through western Bolivia to the Ñuble Region of Chile and in Argentina into Catamarca Province. It inhabits open grasslands, bogs, and the shores of lakes and lagoons. In elevation it is found almost entirely above 3,000 m (9,800 ft) but in Chile moves lower temporarily in times of heavy winter snow.
- 迁徙
- Vertical migration
行为
Except for temporary elevational changes, the Andean goose is a year-round resident throughout its range. They are almost entirely terrestrial but will fly to escape danger and will lead chicks into water to avoid predators.<p>Almost nothing is known about the Andean goose's diet but it appears to be almost entirely grasses. They often form loose flocks except in the breeding season.<p>Andean geese are territorial only in the breeding season, which begins in November, the austral spring. They are believed to form strong year-round pair bonds. They do not make a conventional nest but lay eggs in a scrape among sparse vegetation and sometimes on bare ground. The clutch size is five to ten eggs. Males guard females during the incubation period of about 30 days.<p>The Andean goose is very vocal, and males and females have very different voices. Males make "a "soft huit-wit-wit..., crip, quiop, [a] low, grunting kwwwwwu..., [a] single-syllable threat whistle, and double-syllable sexual calls." Females make a louder "somewhat grating kwa-kwak and "a hoarse gack-gack".
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Black-faced Hawk
Leucopternis melanops
Smallish chunky hawk. Identifiable by size, shape, and prominent black mask contrasting with orange cere. Generally rare. Inhabits wet forests where it hunts from the mid-level to the ground; often perches well below canopy level. Takes relatively small prey, chiefly frogs and snakes. Superficially similar to White Hawk but much smaller with orange (not blue-gray) cere; unlike White Hawk, Black-faced tends not to soar for long periods and is less frequently seen than White Hawk.
Philippine Dwarf-Kingfisher
Ceyx melanurus
A tiny kingfisher of lowland forests, often near streams. Overall orange, brighter on the underparts and face, with bright red bill and legs, a white throat, belly, and mark behind the cheek, and black stripes down the side of the back. Note the pinkish-purple tinge to the head and chest. Birds on Luzon have a darker wing and a bluish ear. Somewhat similar to Dimorphic Dwarf-Kingfisher, especially when seen from the front or below, but Philippine lacks the bright blue head and back. Voice is a rather sharp, high-pitched note, “tsreek.”
Flock Bronzewing
Phaps histrionica
Large desert pigeon, typically observed as fast-flying flocks coming in to drink in the morning or evening in arid and semi-arid inland Northern Australia. Plain brown above, plain gray below. Male has black-and-white patterned head, in female and juvenile a more muted brown-and-white pattern. Upperwings plain brown, with plain gray outer wing; similar Common Bronzewing has a metallic wing panel.
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