Kelp Goose
Chloephaga hybrida
A distinctive goose found locally along rocky coasts and in intertidal areas; very rarely away from the shoreline. Usually in pairs or small groups, readily associating with other geese. Pure white male stands out at long range, but handsomely patterned female can be cryptic—note her white tail, pale brown cap. First-year males are variably intermediate in plumage between adult males and females. In flight, females show bold black-and-white wing pattern like other austral geese such as Upland Goose.
识别特征
The kelp goose is 55 to 65 cm (22 to 26 in) long. Males of the nominate subspecies weigh 2.54 to 2.58 kg (5.6 to 5.7 lb) and females 2.00 to 2.02 kg (4.4 to 4.5 lb). Subspecies C. h. malvinarum is heavier: Males weigh 3.25 to 3.60 kg (7.2 to 7.9 lb) and females 2.05 to 2.80 kg (4.5 to 6.2 lb). The two subspecies have the same plumage but the sexes are completely different. Adult males are entirely white but for a black bill with a pink spot on the maxilla and yellow legs and feet. Adult females have a pale brown crown and chocolate brown head, neck, and mantle. Their breast and flanks have black and white bars and their back, tail, and undertail coverts are white. Their bill is pink and their legs and feet yellow. Juvenile males resemble adult females but with brown "shoulders" and greenish-yellow legs and feet. Juvenile females have a dark crown and dark uppertail coverts.
分类信息
The kelp goose has two subspecies, the nominate C. h. hybrida and C. h. malvinarum.
- 学名
- Chloephaga hybrida
- 命名信息
- (Molina, 1782)
- 目
- Anseriformes
- 科
- Anatidae
- 属
- Chloephaga
分布与栖息地
The nominate subspecies of kelp goose is found on coastal southern Chile and Argentina including the Tierra del Fuego archipelago. C. h. malvinarum is found only on the Falkland Islands. Except when nesting, the species inhabits rocky coasts or shingle beaches with kelp beds offshore. It nests at coastal freshwater lakes.
- 迁徙
- Complete migrants
行为
The nominate subspecies of kelp goose is found year-round along the southern Chile coast and in Tierra del Fuego. It is mostly sedentary, with some individuals moving further north in Chile and others north along the Atlantic coast of Argentina in the austral winter. C. h. malvinarum is also mostly sedentary throughout the Falklands, but some individuals move from more exposed offshore islands to larger ones in winter.<p>The kelp goose is almost entirely vegetarian, though it probably ingests small invertebrates incidentally. It forages mostly by grazing though it sometimes dips under water to feed. On the coast it feeds on several species of seaweed and some algae. During breeding it feeds on grass and in winter sometimes on berries. During the summer, 100 or more non-breeding geese may gather on the shore.<p>The kelp goose's breeding season (up to hatching) on the mainland extends from October to January; that on the Falklands begins somewhat sooner and extends only to November. The species nests in pairs or loose groups. It builds a nest of grass lined with down, on the mainland near somewhat inland freshwater lakes and on the Falklands close to the shore. Nests are sited in vegetation or beside a boulder or driftwood. The clutch size is three to seven eggs. Males guard females during the incubation period of about 30 days. Young leave the nest shortly after the last egg hatches and fledging occurs 12 to 13 weeks after hatch. Both parents care for the young into winter.<p>Male and female kelp geese have different vocalizations: Males make a "whistled 'si-si-si'" and females "low honking 'arnk-arnk', 'ooer' or 'ooeroo' calls". Very young chicks make "a double-noted 'cheep'."
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
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Dicrurus waldenii
Bold, glossy-black bird with a very long and deeply forked tail and a red eye. An uncommon species that is confined to the island of Mayotte in the Comoros. Found locally in remnant rainforest, secondary forest, plantations, and mangroves. Perches prominently on open perches, swooping out to catch insects on the wing. Song is a liquid sequence of whistles, creaks, and rasps, often given as a duet.
Crimson Finch
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Elegant, long-tailed finch, adult male brown above, intense crimson below, with a cherry-red face and small pale spots on the side of the chest. Birds in New Guinea and Cape York with white belly, those elsewhere in Australia with black. Female duller, with only red face. Juvenile mostly brownish with dark bill but note long tail. Star Finch has shorter tail, greener plumage. Inhabits tall grass areas, especially with Pandanus (palm-like tree with leaves attached in a corkscrew pattern).
Raso Skylark
Alauda razae
Found only on Raso Island of the Cape Verdes. Overall grayish-brown and moderately streaked including the breast. Note the large and heavy bill. Sometimes erects small crest. Belongs to the same genus as Eurasian Skylark, but is smaller with shorter wings and tail than Eurasian Skylark. Found along dry riverbeds on flat plains. Song is similar to that of Crested Lark. Call a short rattle, "Chureep."
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