Montana may not strike you as the perfect place to spend the winter, but every year thousands of travelers disagree. Most of the feathered ones from the north flit past, true, but others recognize the Treasure State as the ultimate place to chill out for months. They migrate here every year: rough-legged hawk, snowy owl, northern shrike, common and hoary redpoll, American tree sparrow, Bohemian waxwing, snow bunting and Lapland longspur.