Aythya marila
Medium sized diving duck. Male with white sides and light grey,finely mottled back. Female mostly brown with prominent white feathering at base of bill (more white than most female Tufted Ducks), and often a pale cheek patch (sometimes missing in winter plumage). Large rounded head with no hint of tuft. Bill grey with much smaller, narrow, black nail than Tufted Duck. Wings with similar wing stripe as Tufted. Floats low in water.
Male call carries only a few meters: a whistling "po-ho" last syllable slowly descending. Female calls with harsh "harr-harrr-harrr".
Wikipedia: map (se also Xeno-canto below)
Birdlife ecology
Sounds:Recorded by Patrik Åberg,http://www.xeno-canto.org ,CC license
