See Kaufman (1992, Am. Birds 46:323-326) for information on identification.
Montana Range
Observations in Montana: 2111
Montana CountiesBeaverhead, Big Horn, Blaine, Broadwater, Carbon, Carter, Cascade, Chouteau, Custer, Daniels, Dawson, Deer Lodge, Fallon, Fergus, Flathead, Gallatin, Garfield, Glacier, Golden Valley, Granite, Hill, Jefferson, Judith Basin, Lake, Lewis and Clark, Liberty, Lincoln, Madison, McCone, Meagher, Missoula, Musselshell, Park, Petroleum, Phillips, Pondera, Powder River, Powell, Prairie, Ravalli, Richland, Roosevelt, Rosebud, Sanders, Sheridan, Silver Bow, Stillwater, Sweet Grass, Teton, Toole, Treasure, Valley, Wheatland, Wibaux, Yellowstone
Normal migration periods in the Bozeman area are from May 22 to May 30 and August 10 to 30.
Near Fortine, egg dates are from June 26 to July 10. They nest from mid-June to late July statewide.