The more common Brewers, another Spizella, I post here for comparison. At least it has been identified as Brewers. Sometimes the desert birds adopt some softer colors.
Fraser
Think I'm going to change my call on the first bird to first-year white-crowned sparrow. Seems long-tailed and long-necked for chipping. Compare this WCSP: http://www.photobirder.com/Bird_Photos/white_crowned_sparrow_r151.jpg
WCSP is by far the most common sparrow in this area in winter, and they are around now as well.
Best,
Jim
I like the information action on this post, and realize that this is a difficult bird. Breeding plumage would be easier.
I see where you are getting the White-crowned Sparrow from. But to me I don't think it looks right for one. The eye-line is not right for a White-crowned (but prefect for 1st winter Chipping), among other things. The bird is in a awkward pose, making it appear longer tailed and longer-necked (IMO).
IME head markings on young sparrows are somewhat variable. Can you elaborate on what aspect of the eye-line you think points towards chipping and away from white-crowned?
Best,
Jim