Orange or Yellow Warbler

Need help on this ID from Sweetwater (Tucson, AZ). One person at Sweetwater said Orange Crowned Warbler and another said Yellow Warbler. I do see a patch of light gray on the crown but not sure if that is enough of a difference.
Thanks,
Jim

I'd say with confidence (but not certainty) that it's an Orange-crowned. A dark tail (a Yellow would show lots of yellow from below), a bit of a line through the eye (especially in front), and a rather dingy breast.

Orange-crowned Warbler.

Thanks Brian and Rich.