15 cm (6") Fairly common. Southwestern United States. Dry grasslands, shrubs, cactus, mesquite.
Streaked gray-brown upperparts. Unstreaked underparts. Long rounded dark gray-brown tail with white tips (seen best in flight).
Secretive. Told best from similar Botteri's Sparrow, where their ranges overlap in southeastern Arizona, by song which unlike Botteri's is often given in flight.
Song: musical trill sandwiched between 2-3 lower introductory notes and 2 lower ending notes.
Videos
Watch
Credit: Brady Beck
Watch
Credit: birdingjeff
Images

Credit: Aaron Maizlish

Credit: Tim

Credit: sfitzgerald

Credit: Jason Forbes

Credit: Bill Bouton

Credit: Dominic Sherony

Credit: Nate Swick

Credit: Bill Keim

Credit: Tony Leukering