Lesser ScaupAythya affinisLesser Scaup (Aythya affinis) is a species in the genus Aythya, family Anatidae, order Anseriformes.Scientific classificationRankTaxonDomainEukaryotaKingdomAnimaliaPhylumChordataClassAvesOrderAnseriformesFamilyAnatidaeGenusAythyaSpeciesAythya affinis