Our late hummingbird was here from Oct 23 through the morning of Nov 2. It appeared to be feeding all right that morning even though the sub freezing temperature had made the water slushy. It might have gotten brain freeze and decided it was time to leave. If we have another late hummer I'm going to bring the feeders inside overnight if temperatures are expected to be subfreezing. Frank Lyne frank@xxxxxxxxxxx near Dot in logn County