Warning: Display title "Anas" overrides earlier display title "<i>Anas</i>". Anas asalin halittar ducks ne . Ya haɗa da pintails, yawancin teals, da mallard da dangi na kusa. A baya ya haɗa da ƙarin nau'in amma biyo bayan buga nazarin ilimin halittar ƙwayoyin cuta a cikin shekara ta 2009 an raba jinsi zuwa sassa huɗu. Halittar yanzu ta ƙunshi nau'in halittu 31. Sunan Anas shine Latin don "duck". FMasanin ilimin halitta Carl Linnaeus dan Sweden ya gabatar da nau'in Anas a cikin shekara ta 1758 a bugu na goma na Systema Naturae . Anas shine kalmar Latin don agwagwa. Halittar a baya ta ƙunshi ƙarin nau'in. A cikin shekara ta 2009 an buga babban binciken ilimin halittar ƙwayoyin cuta wanda aka kwatanta jerin DNA na mitochondrial daga ducks, geese da swans a cikin dangin Anatidae . Sakamakon ya tabbatar da wasu daga cikin ƙananan ƙananan binciken da aka yi a baya kuma ya nuna cewa asalin halittar kamar yadda aka bayyana a baya ba ta monophyletic .