Passerella iliaca
HOW TO IDENTIFY:
* Length: 6.25 inches * Conical bill with yellow lower mandible * Very large sparrow * Thick malar streak * Heavy spotting below * Extremely variable plumage across range * Sexes similar
Eastern United States:
* Gray crown, nape and back * Bright rusty rump and tail * Rusty brown cheeks, malar streak, streaks on back, wings and spotting below
Western United States:
* Dark brown to gray upperparts * Wings and tail sometimes same color as back, sometimes browner * Bill size very large in one race * Spotting underneath usually very dark
Similar species:
The Fox Sparrow is much larger than other sparrows and might at first be mistaken for a thrush but note the thick, conical bill.
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