White-crowned SparrowZonotrichia leucophrys
6-7 1/2" (15-19 cm). Similar to White-throated Sparrow, but more slender, without white throat, and generally with a more erect posture. Crown has bold black and white stripes. Upperparts streaked, underparts clear pearly gray. Pink bill. Young birds similar, but crown stripes buff and dark brown, underparts washed with dull buff.