Camptorhynchus
| Labrador duck | |
|---|---|
 |
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| Stuffed specimens, AMNH | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Anseriformes |
| Family: | Anatidae |
| Subfamily: | Merginae |
| Genus: |
†Camptorhynchus Bonaparte, 1838 |
| Species: | †C. labradorius |
| Binomial name | |
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Camptorhynchus labradorius Gmelin, 1789 |
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The Labrador duck (Camptorhynchus labradorius) is an extinct North American bird; it has the dubious distinction of being the first endemic North American bird species to become extinct after the Columbian Exchange. It was already a rare duck before European settlers arrived, and became extinct shortly after. As a result of its rarity, information on the Labrador duck is not abundant, but some, such as its habitat, characteristics, dietary habits, and reasons behind extinction, are known. There are 55 specimens of the Labrador duck preserved in museum collections worldwide.
The Labrador duck is considered a sea duck. A basic difference in the shape of the process of metacarpal I divides the sea ducks into two groups:
The position of the nutrient foramen of the tarsometatarsus also separates the two groups of sea ducks. In the first group, the foramen is lateral to the long axis of the lateral groove of the hypotarsus; in the second, the foramen is on or medial to the axis of that groove.
The Labrador duck was also known as the pied duck and skunk duck, the former being a vernacular name that it shared with the surf scoter and the common goldeneye (and even the American oystercatcher), a fact that has led to difficulties in interpreting old records of these species. Both names refer to the male's striking white/black piebald coloration. Yet another common name was sand shoal duck, referring to its habit of feeding in shallow water. The closest evolutionary relatives of the Labrador duck are apparently the scoters (Melanitta).
The female plumage was gray. Although weakly patterned, the pattern was scoter-like. The male’s plumage was black and white in an eider-like pattern, but the wings were entirely white except for the primaries. The trachea of the male was scoter-like. An expansion of the tracheal tube occurred at the anterior end, and two enlargements (as opposed to one enlargement as seen in scoters) were near the middle of the tube. The bulla was bony and round, puffing out from the left side. This asymmetrical and osseus bulla was unlike that of scoters; this bulla was similar to eiders and harlequin duck's bullae. The Labrador duck has been considered the most enigmatic of all North American birds.
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Wikipedia