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Montana Range
Observations in Montana: 218
Montana Counties, Beaverhead, Big Horn, Blaine, Broadwater, Carbon, Carter, Cascade, Chouteau, Custer, Dawson, Deer Lodge, Fallon, Fergus, Flathead, Gallatin, Garfield, Glacier, Golden Valley, Hill, Lake, Lewis and Clark, Liberty, Lincoln, Madison, McCone, Meagher, Missoula, Musselshell, Park, Phillips, Pondera, Powder River, Powell, Prairie, Ravalli, Roosevelt, Rosebud, Sanders, Sheridan, Stillwater, Sweet Grass, Teton, Toole, Valley, Wheatland, Yellowstone
Bozeman area migration periods are from May 5 to May 20 and July 17 to October 20, with peaks on May 12 and September 25 (Skaar 1969).
In migration, they are found in grassy marshes (Johnsgard 1986).