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.
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.