While taking some shots of various ducks at Crystal Springs Rhododendron Garden, I noticed an American Wigeon with a rather white face. It was among a feeding frenzy caused by a visitor tossing feed into the water. It really stood out from the rest of the ducks.
I did a web search on "white cheeked" American Wigeons and found that it is a rare morph. One site stated that it occurs in about 1 out of every 500 birds. Not that rare considering the number one can see around here doing the winter. Based on some of the pictures I saw, some cases are not as extreme as this bird's coloration, so I suppose it may not always be as apparent.
A typical male American Wigeon taken earlier in the day at Westmoreland Park, cheeks heavily covered in small dark specks.