White-throated SparrowZonotrichia albicollis
6-7" (15-18 cm). Upperparts streaked, underparts clear gray. There are 2 color forms, one with black and white head stripes, the other with tan and black head stripes. Both have sharply defined white throat patch; dark bill. Females and young birds are duller. Similar White-crowned Sparrow lacks white throat patch, is slimmer, and has a pink bill.