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Kingdom: Animalia (Animal) Phylum/Division: Chordata (chordates) Subphylum/Subdivision: Vertebrata (vertebrates) Infraphylum/Infradivision: Gnathostomata (jawed vertebrates) Superclass: Tetrapoda (four-footed) Class: Aves (Birds) Order: Anseriformes (ducks, geese, swans, waterfowl) Family: Anatidae (ducks, geese, swans) Genus: Aythya (Diving Ducks) Species: Aythya collaris (Ring-necked Duck) Gender: Female Age: Mature Gender: Female Gender: Male Gender: Male Age: Mature Gender: Male Plumage: Breeding Gender: Male Age: Mature Age: Mature Gender: Male Species: Aythya marila (Greater Scaup) Gender: Multiple Gender: Male, Female Age: Mature Gender: Female Gender: Female Gender: Female Gender: Male Age: Mature Gender: Male Age: Mature Gender: Male