description Lake duck Overview
The lake duck, Oxyura vittata, is a stiff-tailed duck native to South America and also known as the Argentine lake duck. The species is notable for the unusual reproductive anatomy of its males: a male studied near Córdoba, Argentina, had an everted penis measuring 42.5 centimetres. This record has made the species a reference point in scientific discussions of avian sexual anatomy and sexual selection.
help Lake duck FAQ
What species is the lake duck?
The lake duck is Oxyura vittata, also called the Argentine lake duck. It is a stiff-tailed duck native to South America.
Why is the male lake duck famous?
Males are known for an unusually large reproductive organ compared with other birds. A specimen studied near Córdoba, Argentina, measured about 42.5 centimeters when everted.
Where does the lake duck live?
The species is native to South America and is associated with lakes and other freshwater wetlands. Its stiff tail is a characteristic feature of the Oxyura group.
Is the lake duck related to the ruddy duck?
Yes. The lake duck belongs to the same stiff-tailed duck genus, Oxyura, as the North American ruddy duck. They are related waterfowl but are different species.
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