Baikal Teal
Sibirionetta formosa
Males is exquisitely patterned, with an unmistakable green-and-yellow facial pattern, spotted rose-pink breast, and long, drooping scapulars. Female mostly drab brown but with a distinct white spot near the bill base as well as a very weak hint of the male's facial pattern. Breeds in marshy woods and on the tundra. During the non-breeding season, gathers in groups of up to several thousand in marshes and estuaries in northeastern Asia; generally uncommon outside core wintering grounds.
识别特征
At between 39 and 43 centimetres (15 and 17 in), this duck is slightly larger and longer-tailed than the common teal. The breeding male is unmistakable, with a striking green nape, yellow and black auriculars, neck, and throat. It has a dark crown, and its breast is light brown with dark spots. It has long dropping dark scapulars, and its grey sides are set off on the front and rear with white bars.<p>The Baikal teal has a height from 11.75 to 15.75 inches and a weighs an average of 1 pound.<p>The female looks similar to a female green-winged teal but with a longer tail, and a distinctive white spot at the base of the bill and a white throat that angles to the back of the eye. She also has a distinct light eyebrow bordered by a darker crown. The underwing is similar to the Green-winged Teal also, but has a darker leading edge. The green speculum has an indistinct cinnamon-buff inner border. Some "females" have "bridle" markings on their faces, but it has been suggested that at least some of these bridled "females", if not all, are in fact juvenile males. The juvenile has a plumage similar to that of the female and can be distinguished from the Common Teal by the pale loral spot.<p>In non-breeding (eclipse) plumage, the drake looks more like the female, but plumage is a much richer reddish-brown (rufous) colour.
分类信息
The first formal description of the Baikal teal was by the German naturalist Johann Gottlieb Georgi in 1775 under the binomial name Anas formosa. A molecular phylogentic study published in 2009 found that the genus Anas as then defined was non-monophyletic. Based on this analysis the genus was split into four proposed genera with the Baikal teal placed in the resurrected genus Sibirionetta that had been introduced by the German zoologist Hans von Boetticher in 1929. The name Sibirionetta is derived from the Latin sibiricus for Siberia and the Ancient Greek nētta for a duck. The specific epithet formosa is from the Latin formosus for "beautiful".
- 学名
- Sibirionetta formosa
- 命名信息
- (Georgi, 1775)
- 目
- Anseriformes
- 科
- Anatidae
- 属
- Sibirionetta
分布与栖息地
It breeds within the forest zone of eastern Siberia from the Yenisey basin eastwards to Kamchatka, northern Koryak, eastern Magadan Oblast, northern Khabarovsk Krai, southeastern and northern Sakha east central Irkutsk Oblast, and northern Krasnoyarsk Krai. It is a migratory species, wintering in South Korea, Japan, Taiwan, northern and eastern China, from Beijing down the coast to the Vietnam border, and west to Yunnan then north to Chongqing and Henan.<p>It breeds in pools on the tundra edge and within swampy forests. In winter it is found on lowland fresh waters.
- 繁殖区
- PAL : e Siberia
- 非繁殖区
- se China and Japan
- 迁徙
- Complete migrants
保护状况
- 种群趋势
- rising
照片
分布
鸟叫声
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