Bohemian Waxwings are common winter visitors to much of Montana, particularly where there is any sort of fruit remaining on the trees. Most often their fruit of choice is something like crab apples or Mountain Ash berries, but I have also watched them down the little olives from Russian Olive trees. They often form very large skittish flocks of 800 or more individuals that swirl around from tree to tree.
They often perform some interesting gyrations to get just the right fruit.
Last week a few showed up at the local city park to work over the last of the apples there.