American Tree Sparrow
Adult upperparts are reddish-brown and streaked with black and tan. There are two bold, white wing bars. The head is gray with a reddish-brown crown, line off the rear edge of the eye and shoulder crescent. The bill is bicolored: dark on top and yellow below. Underparts are clear gray with a dark spot in the center of the breast (like a "stickpin"). There is a rusty wash on the flanks. The legs are black. The song begins with several clear whistles followed by a rapid warble. The call is a high, tinkling, three-syllable phrase: "tzeedle-eet," most frequently heard in winter in Missouri.