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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

Age: Mature
Gender: Male

Species: Aythya marila (Greater Scaup)
Gender: Female

Gender: Female

Gender: Female

Gender: Multiple

Age: Mature
Gender: Male, Female

Gender: Male

Age: Mature
Gender: Male