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Montana Range
Observations in Montana: 445
Montana CountiesBeaverhead, Big Horn, Blaine, Broadwater, Carbon, Cascade, Chouteau, Custer, Dawson, Deer Lodge, Fergus, Flathead, Gallatin, Garfield, Glacier, Granite, Hill, Lake, Lewis and Clark, Liberty, Lincoln, Madison, Meagher, Missoula, Musselshell, Park, Phillips, Powell, Ravalli, Roosevelt, Rosebud, Sanders, Sheridan, Stillwater, Teton, Toole, Valley, Wheatland, Yellowstone
Up to 1000 birds have been noted in the spring during the Ennis Lake Migration. In the Bozeman area dates are March 17-April 25 and October 25-December 5 with the peak in early April and November.