Murray 1948 Canyon Wren Apr 20 Alaska, 4400 ft., Baja California (Sierra Juarez) Found the bird in an upper Sonoran growth here at the top of the mountain. There were pinyon pines, ceanothus, much scrub oak and Adenostoma, among large granite boulders and outcappings. The wren was on top of a boulder, singing rather steadily. When disturbed it flew in beneath some rocks for a few moments, then out to another where it sang, stretching upward and holding the head up high each time.