[Mystery bird] Savannah Sparrow, Passerculus sandwichensis, photographed in Snohomish County, Washington State. [I will identify this bird for you tomorrow]
Image: Marv Breece, 19 April 2007 [larger view].
Canon EOS 350D 1/2000s f/6.3 at 270.0mm iso400.
Please name at least one field mark that supports your identification.
Review all mystery birds to date.