This photo shows what one hunter in SE Idaho observed this past week.
At the very least, the migration has started. Reports are that geese are all over South East Idaho, and ducks are coming in. The smaller bodies of water have frozen over already, and the edges are starting to freeze around the edges on the larger ones. Colder weather is in the forecast. Soon, the birds will be limited to the river.
Which won't bother the ice fishers at all.
More info can be gleaned here.
~ J. Bunch