This bird has been seen in January several times by local birders near Jamestown. The head looks very much like a White-throated Sparrow, with white throat, white crown stripe, black lateral crown stripe and broad white supercilium. Song can show white throat. There is no yellow on the supraloral, as for White-throated, but on one side it appears buffy. The broad white crown stripe also resembles that of a White-crowned Sparrow. The forehead shows both black and brown. The lower mandible shows a slight, but interesting angle. The bill appears bicolored, gray above, pinkish below. But the underparts are streaked like a Song Sparrow, a species which shows wide variation in striping pattern and brownish coloration. In this case, there's blackish streaking on the breast and rufous streaking on the flanks.
The cheek shows some whitish and there is some gray there, too. Interestingly, the tertials are edged in white, not a typical feature of Song or White-throated, though shown in some White-crowneds. There are small white tips to the greater coverts, though not obvious wingbars.
Many species can show unusual white in their plumage, but the broad white crown stripe and black lateral crown stripe are especially intriguing as they are not features of Song. If a hybrid, it might then be of species of different genera, rare, but not unheard of. There is also the possibility of grandparent genes also being expressed.
Photos by Deborah Humphries.
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Brian Taber
