tags: Song Sparrow, Melospiza melodia, birds, mystery bird, bird ID quiz
[Mystery bird] Song Sparrow, Melospiza melodia, photographed in Arizona. [I will identify this bird for you tomorrow]
Image: Richard Ditch, 12 November 2007 [larger view].
Date Time Original: 2007:11:12 09:10:55
Exposure Time: 1/124
F-Number: 8.00
ISO: 400
Please name at least one field mark that supports your identification.

I think that's a song sparrow. The markings on the head, wings, back, and flanks all fit, as does the beak. I've been watching these guys a lot lately, and this bird is the spittin' image of the ones I've been watching.
Song Sparrow (Melospiza melodia)
Beak says "sparrow", brown flecks on breast and browns tripe on head say song sparrow
There one right outside my window...but can't remember the name.
Since this one got ID'ed so fast, here's some more poetical mysteries about birds from Dave Bonta, over at Via Negativa.