Thanks to everyone who responded. 

I also found these links in addition to the one Ed provided. This discusses White-fronted x Canadas. http://www.flickr.com/groups/hybridbirds/discuss/72157603597119542/   And this one domestic Greylag x Canadas. http://www.flickr.com/groups/hybridbirds/discuss/72157601783914618/

Dan Haas and I had the same tongue-in-cheek thought based on the facial patterning. Some female Canada was so entranced and besotted when she saw her first male wood duck that she let things go a little too far...  Remember your first reaction to your first good look at a male wood duck? Could happen!

Anyway, live and learn.
Nancy Magnusson
Ellicott City, MD