I found an odd female Mallard at Amos Waites Park in Mimico on Saturday. There are more flavours of Mallard hybrids than Baskin & Robins ice cream, and females are kind of nondescript to start with, but the facial pattern really got my attention. My best guess is that there are some Gadwall genes involved.
This image shows that there is some typical blue on hte wing:
Another view:
Suggestions? Opinions?
BB