Subtly handsome sparrow of northwest Mexico, with range extending just into Arizona. Note the black-and-white throat stripes (five stripes, including the white central throat), brownish upperparts, and gray breast with black central spot. Found in brushy scrub and thorn forest, especially on rocky slopes. Usually in pairs, which keep in touch with high, rhythmic twittering choruses. Can be very skulking. Mostly stays low in brush or on the ground, but sings from atop bushes.