Parent: Emberizidae (Emberizid finches)

└─ Passerella (Fox sparrows)

└─── Passerella iliaca (Fox sparrow)

└─── Passerella megarhyncha (Large-billed fox sparrow)

└─── Passerella schistacea (Slate-colored fox sparrow)

└─── Passerella unalaschcensis (Sooty fox sparrow)