After reading my Recod column on the smoke-phased Wild Turkey, Chris Reiser wrote:

Last week I was surprised to see a white headed bird eating seeds on my front walk [in Wantage].

Unfortunately I didn’t have my good camera close by but when I viewed it with binoculars the yellow spots by the beak were very evident-a white throated sparrow.

Sadly, it didn’t return. A nice surprise. 

Thanks, Chris!

I also found an instance of a white-headed House Finch on Feeder Watch, here.  And another white-headed sparrow on the What Bird? Forum, here. I think that makes these partially leucistic, but white-headed is far more descriptive.