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The lake duck grows to 36–46 centimetres (14–18 in). Females weigh 510–700 grams (18–25 oz) and males 600–850 grams (21–30 oz). Males can be distinguished from Andean duck (Oxyura ferruginea), a similar species, by being smaller and having a flatter head. [2] Female ducks have an anti-corkscrew vagina made for difficult penetration.
It resembled a small ruddy duck or, even more, an Argentine blue-bill. A larger Middle Pleistocene fossil form from the southwestern United States was described as Oxyura bessomi; it was probably quite close to the ruddy duck. "Oxyura" doksana from the Early Miocene of Dolnice (Czech Republic) cannot be assigned to any anatine subfamily with ...
Lake duck, O. vittata The black-headed duck of Heteronetta is indisputably quite basal , looking more like a typical duck-like Anatidae with a short tail and normal bill. The masked duck of Nomonyx has a more intermediate position; it probably diverged from the lineage leading to the main radiation some time after Heteronetta .
Add 1 to 2 tablespoons of the reserved pasta water at a time, if desired, to loosen the sauce. The pasta will absorb the sauce as it stands. Serve immediately.
Ruddy duck: Oxyura jamaicensis (Gmelin, JF, 1789) 168 Andean duck: Oxyura ferruginea (Eyton, 1838) 169 Lake duck: Oxyura vittata (Philippi, 1860) 170 Blue-billed duck: Oxyura australis Gould, 1837: 171 Maccoa duck: Oxyura maccoa (Eyton, 1838) 172 White-headed duck: Oxyura leucocephala (Scopoli, 1769) 173 Musk duck: Biziura lobata (Shaw, 1796) 174
Oxyura jamaicensis (Gmelin 1789) (ruddy duck) LC; Subgenus (Cerconectes) Wagler 1832. Oxyura ferruginea (Eyton 1838) (Andean duck) LC; Oxyura vittata (Philippi 1860) (lake duck) LC; Oxyura australis Gould 1837 non Horn 1983 (blue-billed duck) NT; Oxyura maccoa (Eyton 1838) (maccoa duck) VU A4be; Oxyura leucocephala (Scopoli 1769) (white-headed ...
Ring-necked duck, Aythya collaris (V) Lesser scaup, Aythya affinis; Brazilian merganser, Mergus octosetaceus (E-SA) Black-headed duck, Heteronetta atricapilla (E-SA) Masked duck, Nomonyx dominicus; Ruddy duck, Oxyura jamaicensis; Lake duck, Oxyura vittata (E-SA)
Ruddy duck, Oxyura jamaicensis (the local subspecies is also called Andean duck) Lake duck, Oxyura vittata; New World quails. California quail, introduced in 1870.