[Tweeters] Song Sparrow with a yellow face?

[Shelf Life Community Story Project]

Can’t figure out if this Song Sparrow stuck its face in a flower, has an affliction, or actually has a yellow face. 
Photos taken in my front yard in the Central District (Seattle)
https://photos.app.goo.gl/qrUFdxahvUGYQe5W7 <https://photos.app.goo.gl/qrUFdxahvUGYQe5W7>

Jill


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