Species concept | American Ornithologists' Union 1st edition (1886) | American Ornithologists' Union 2nd edition (1895) | American Ornithologists' Union 3rd edition (1910) | American Ornithologists' Union 4th edition (1931) | American Ornithologists' Union 5th edition (1957) | American Ornithologists' Union 6th edition (1983) | American Ornithologists' Union 7th edition (1998) | American Ornithologists' Society 7th edition (incl. 63rd suppl.) |
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* Aythya valisineria← | Aythya vallisneria Canvas-back |
Aythya vallisneria Canvas-back |
Marila valisineria Canvas-back |
Nyroca valisineria Canvas-back |
Aythya valisineria Canvasback |
Aythya valisineria Canvasback |
Aythya valisineria Canvasback |
Aythya valisineria Canvasback |
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