Then it occurred to me. The hive was still in the shade, so a flashlight was in order. Sure enough, the bees had withdrawn into the recesses and tucked themselves tightly between the combs for warmth. In the deep, dark bee space, I could see tiny bee heads shining back at me. Later, when the sun had risen just a bit more and had warmed the hive, the bees came out and foraged.
Interestingly, at least to me, the drones have not been kicked out yet. We refilled the feeding tray 4 days ago, in anticipation of Winter's sneak preview, so they're probably thinking there's no need to ration yet.
10/23/08 Weather Update: First Hard Freeze - the girls are starting to get a little defensive now and are patrolling the sides of the hive. So much for the constant carefree window-peering.
Today's High: 51°F (Normal: 59°F)
Overnight Low: 28°F (Normal: 33°F)