Leucistic Fox Sparrow
Jen Cedarleaf provided these photos of a Leucistic Fox Sparrow she’s been seeing this week on Alice Island.
(click for larger version)
Despite the unusual coloring, I’m pretty confident it’s a Fox Sparrow due to the shape of the head, the lack of any suggestion of stripes on the face, and chevrons rather than stripes on the chest. Jen said it behaved more like a Fox Sparrow than a Song Sparrow (the other most likely alternative) as well.