These three pictures show a bird at the headquarters of Graylodge Unit of the Sacramento National Wildlife Refuge. The photos are by George Peterson of Ashland.
Last spring I had a Red-breasted Nuthatch in my garden with this malady. He didn’t last the summer.
Here’s the information on this problem which is still unexplained. If you see such examples, please report to the scientists studying the problem which was first noted in Alaska. Anybody wanna bet its some manmade chemical we’re putting into the environment? Like the stuff killing honey bee colonies…
Towheeblog 
I photographed a Stellar Jay in Lake Tahoe with this same problem last year. 😦
By: circadianreflections on February 19, 2015
at 5:24 pm
I saw an Orange-crowned Warbler with a single white blotch on its forehead. I wonder if that is the same thing…
Orange-crowned Warbler
By: Paul Randall on February 21, 2015
at 4:12 am
likley, all bird species are prone to occasional occurences of leucistic plumage
By: atowhee on February 22, 2015
at 9:00 pm