Waterfowl of North America: Name DerivationsWaterfowl of North America, Revised Edition (2010)
Date of this Version1-1-2010
Excluding extralimital species and most subspecies unless these are sometimes considered full species.
Aix [through] Spatula
Citation InformationPaul A. Johnsgard. "Waterfowl of North America: Name Derivations" (2010)
Available at: http://works.bepress.com/paul_johnsgard/182/