The Vesper Sparrow is a chunky bird with a finely streaked breast and an unstreaked belly, a short to medium-length notched tail, and white outer tail feathers visible in flight. It has a white eye-ring and a dark ear patch bordered in white along the lower and rear edges. The small chestnut patches on its shoulders are not always visible. Vesper Sparrows west of the Cascades have a pinkish hue and are smaller and browner than eastern Washington birds. Vesper Sparrows are somewhat similar to both the Song and Savannah Sparrows, but are lighter than both. Vesper Sparrows also lack the bold eyeline found in the Savannah Sparrow.

 

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