Mandarin
http://en.wikipedia.org/wiki/Mandarin_Duck
http://en.wikipedia.org/wiki/Image:Mand ... ck.arp.jpg

Carolina Wood Duck
http://www.birdtrek.co.uk/trek/woodduck.htm
http://en.wikipedia.org/wiki/Image:Wood_ducks.JPG

Genetically they are closely related.
http://www.harteman.nl/omnibus/anserifo ... darin.html

I cannot decide which of these is the most beautiful duck in creation.

Roy