SmewMergellus albellusSmew (Mergellus albellus) is a species in the genus Mergellus, family Anatidae, order Anseriformes.Scientific classificationRankTaxonDomainEukaryotaKingdomAnimaliaPhylumChordataClassAvesOrderAnseriformesFamilyAnatidaeGenusMergellusSpeciesMergellus albellus