Search results
Results from the WOW.Com Content Network
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 .
The Oxyura genus is commonly referred to as stiff-tailed ducks. It is widely agreed that Oxyura and Nomonyx (a genus with a single species - the masked duck - Nomonyx dominicus) are sister groups, and these results have been shown in both trait-based and genome-based phylogenies over the past 30 years.
The rufous hornero is the national bird of Argentina. This is a list of the bird species recorded in Argentina. The avifauna of Argentina has 1044 confirmed species, of which 18 are endemic, nine have been introduced by humans, 69 are rare or vagrants, two are thought to be extinct, and four and possibly a fifth have been extirpated. An ...
This is a list of the native mammal species recorded in Argentina. As of January 2020, the list contains 402 mammal species from Argentina , of which one is extinct, seven are critically endangered, seventeen are endangered, sixteen are vulnerable, and thirty are near threatened.
Main page; Contents; Current events; Random article; About Wikipedia; Contact us
The New Zealand stiff-tailed duck was closely related to the Australian blue-billed duck (Oxyura australis) but its bones were about one tenth smaller than those of its Australian relative. The holotype was found in 1967 at Lake Poukawa in Hawke's Bay , North Island , New Zealand and remains in the collection of the Museum of New Zealand Te ...