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5. Passer - type genus of the Passeridae
genus Passer
bird genus - a genus of birds
family Passeridae, Passeridae - true sparrows: Old world birds formerly considered weaverbirds
English sparrow, house sparrow, Passer domesticus - small hardy brown-and-grey bird native to Europe
Passer montanus, tree sparrow - Eurasian sparrow smaller than the house sparrow