Mergus serrator
Noticeably smaller and more slender than Goosander. Bill much thinner, especially at base. Both sexes with more shaggy crest than Goosander. Male: dark head, white collar. Only sawbill with (medium) dark chest. Female differs from Goosander by smooth transition from brown head to grey lower neck, and less contrasting white throat patch. Striking white wing-bars with crossing black stripe visible in flight.
Female call a harsh "karr karr". Male display sound a three-syllabic, fast, "chi-ka-wee" slightly resembling Goldeneye.
Wikipedia: map (se also Xeno-canto below)
Birdlife ecology
