Rupert Minidoka Co. Idaho. Dec. 23, 1936 About 8:00 A.M. in the park which composes the entire central part of the town of Rupert I heard a call sounding very much like that of a Slender-billed Muthatch but with a distinctly harsher quality. I found the bird creeping down the main trunk of a large Aspen continually uttering a loud nasal "kerr." The bird was larger than the Slender-billed, the breast dark gray, cap black bordered by a white line from the bill through the eye, broadening to a wider line behind the eye. The back was darker than that of the Slender-billed. I looked this bird up and found it to be a Rocky Mountain Muthatch. Driving from Rupert to Minidoka we flushed an American Rough Legged Hawk, a Raven and a Marsh Hawk all feeding on carcasses of Jackrabbits which had been killed by autos on the highway. On the train from Minidoka to Shoshone I counted six American Rough Legged Hawks flushed by the approaching train. One Prairie Falcon was seen flying west paralleling the railroad tracks. The train barely gained on the hawk so the bird must have been traveling over 50 miles per hour.