Harlequin Duck
Histrionicus histrionicus

see larger image Harlequin Duck (male) Histrionicus histrionicus San Diego Zoo - San Diego, CA © 2006 Jeff Whitlock see larger image Harlequin Duck (male) Histrionicus histrionicus San Diego Zoo - San Diego, CA © 2006 Jeff Whitlock see larger image Harlequin Duck (male & female) Histrionicus histrionicus San Diego Zoo - San Diego, CA © 2006 Jeff Whitlock see larger image Harlequin Duck (female) Histrionicus histrionicus San Diego Zoo - San Diego, CA © 2006 Jeff Whitlock see larger image Harlequin Duck (male) Histrionicus histrionicus San Diego Zoo - San Diego, CA © 2006 Jeff Whitlock

Related Links
BirdGuides
E.J. Peiker, Nature Photographer
exZOOberence
South Dakota Birds
Flickr - may have photos
Wikipedia - may have a species page