Everything about The Stiff-tailed Duck totally explained
The
stiff-tailed ducks are part of the
Oxyurinae subfamily of
ducks. All have, as their name implies, long stiff
tail feathers, which are erected when the bird is at rest. All have relatively large swollen bills.
These are freshwater diving ducks. Their legs are set far back, making them awkward on land, so they rarely leave the water.
Their unusual displays involve drumming noises from inflatable throat-sacs, head throwing, and erecting short crests.
Plumage sequences are complicated, and aging difficult.
Species
A
fossil species from the
Late Pliocene or
Early Pleistocene of
Jalisco (
Mexico) was described as
Oxyura zapatanima. It resembled a small Ruddy Duck or, even more, Argentine Blue-bill. A larger Middle
Pleistocene fossil form from the southwestern
USA was described as
Oxyura bessomi; it was probably quite close to the Ruddy Duck.
"Oxura" doksana from the
Early Miocene of
Dolnice (
Czech Republic) can't be assigned to any anatine
subfamily with certainty.
Footnotes
Further Information
Get more info on 'Stiff-tailed Duck'.
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