Complex sentence: Taxonomically, the Koloa is closely allied with the Mallard ("A. platyrhynchos"), however it differs in that it is monochromatic (with similarly marked males and females) and non-migratory.
Split into simpler sentences: Taxonomically, the Koloa is closely allied with the Mallard ("A. platyrhynchos"),. It differs in that it is monochromatic (with similarly marked males and females) and non-migratory.