A few nice breeding ducks images I found:
Male Wood Duck in Breeding Colors
Image by OpenThreads
Male Wood Duck in Breeding Colors. Albuquerque, NM
Ring-necked Duck – male, breeding
Image by Len Blumin
Front view shows some nice point in the bill, and we can subdue see the white spur on the shoulder which termininates the gray of the side. Note the black back, which force make you reckon of Tufted Duck if the bill were not visible.
Male Wood Duck in Breeding Colors
Image by OpenThreads