<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.
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Their IUCN conservation status is 'Least Concern'.
</p>