The Rock Wren is a large wren of the arid west. Its back is gray and speckled with light dots. Its flanks are buff-yellow, and its breast is white streaked with gray. Two eye-lines, white over dark, extend behind the eye. In flight, a brown rump patch is evident, as are the pale tips of the tail. The pale tip extends almost all the way across in a terminal band, but is interrupted in the middle by gray. The undertail coverts are white with black bars. Juveniles look like adults but have less streaking on their breasts.