|
The Baikal teal (''Anas formosa''), also called the bimaculate duck or squawk duck, is a dabbling duck that breeds in eastern Russia and winters in East Asia. == Description == At between , 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.. The Baikal teal has a height from 11.75 to 15.75 inches and a weighs an average of 1 pound. 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. In non-breeding (eclipse) plumage, the drake looks more like the female, but plumage is a much richer reddish-brown (rufous) colour. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Baikal teal」の詳細全文を読む スポンサード リンク
|