Mystery Bird: Brewer's Sparrow, Spizella breweri

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[Mystery bird] Brewer's Sparrow, Spizella breweri, photographed in Arizona. [I will identify this bird for you tomorrow]

Image: Richard Ditch, 2008 [larger view].

Date Time Original: 2008:03:13 09:12:01
Exposure Time: 1/319
F-Number: 8.00
ISO: 400

Please name at least one field mark that supports your identification.

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I'm guessing Cassin's Sparrow for this guy. I'm basing that on the "finely streaked crown", "fine spots and streaks" on the breast (sort of), "indistinct supercilium", and "pale eye ring" (maybe?). This is all per Sibley.

I'm leaning toward Brewer's sparrow due to the relatively drab gray breast and faint face pattern.

But a pale, young winter chipping sparrow is not out of the question entirely. The front of the face is somewhat in shadow, maybe making the lores look darkish.

I'm going to go with Brewer's Sparrow due to the pale face pattern and notched tail.

By Michelle Smith (not verified) on 05 Mar 2009 #permalink