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Home > Art, Film & Photography > Diving Ducks: Lesser Scaup, Baer's Pochard, Aythya
Diving Ducks: Lesser Scaup, Baer's Pochard, Aythya

Diving Ducks: Lesser Scaup, Baer's Pochard, Aythya


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About the Book

Chapters: Lesser Scaup, Baer's Pochard, Aythya. Source: Wikipedia. Pages: 20. Not illustrated. Free updates online. Purchase includes a free trial membership in the publisher's book club where you can select from more than a million books without charge. Excerpt: Fuligula affinis Eyton, 1838 Aythya affinis, the Lesser Scaup (singular and plural), is a small North American diving duck that migrates south as far as Central America in winter. It is colloquially known as the Little Bluebill or Broadbill. It is apparently a very close relative of the Holarctic Greater Scaup or "bluebill" (A. marila), with which it forms a superspecies. Adults are 1519 in (3848 cm) long, 16.517 in (4243 cm) on average. Males weigh 2830 oz (790850 g), or 29 oz (820 g) on average; females are a bit smaller and weigh noticeably less, 26 oz (730 g) on average. Wing lengths (not wingspans) are about 7.57.9 in (1920 cm) in males and 7.37.8 in (1920 cm) in females; the tarsus is about 1.41.5 in (3.63.8 cm) long, and the bill 1.41.7 in (3.64.3 cm). The adult males (drakes) in alternate plumage have a black, effervescent head and a small tuft at the hindcrown, a black breast, a whitish-grey back and wings with darker vermiculations and black outer and geyish-brown inner primary remiges. The underparts are white with some olive vermiculations on the flanks, and the rectrices and tail coverts are black. Adult females (hens) have a white band at the base of the bill, often a lighter ear region, and are otherwise dark brown all over, shading to white on the mid-belly. Drakes in eclipse plumage look similar, but with a very dark head and breast, little or no white on the head and usually some greyish vermiculations on the wings. Immature birds resemble the adult females, but are duller and have hardly any white at the bill base. Both sexes have white secondary remiges, a blue-grey bill with a black "nail" at the tip and grey feet; the drakes have a bright yello...More: http: //booksllc.net/?id=26868


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Product Details
  • ISBN-13: 9781158372218
  • Publisher: Books LLC
  • Publisher Imprint: Books LLC
  • Height: 152 mm
  • Sub Title: Lesser Scaup, Baer's Pochard, Aythya
  • Width: 229 mm
  • ISBN-10: 1158372213
  • Publisher Date: 15 Sep 2010
  • Binding: Paperback
  • Spine Width: 1 mm
  • Weight: 45 gr


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