<i>Oxyura vittata</i>
<p>
The Lake Duck is also known as the Argentine Blue-bill, the Argentine Lake Duck
or the Argentine Ruddy Duck.
Lake Ducks are found in Argentina, Chile, Paraguay and Brazil.
Ducks are one of the few birds that have a penis.
Lake Ducks have the longest penis in relationship to their body length for
all vertebrates.
</p><p>
Their IUCN conservation status is 'Least Concern'.
</p>