What sorts of plants or trees do bees naturally collect pollen from in the autumn, or right before the winter? If there are no vegetative plants, like squash or eggplant, what sorts of trees or shrubs do they target? -Thanks!

Greetings from sunny Tennessee, So the days are getting shorter, the nights are getting cooler, and twice in the last few weeks I have found a small swarm of bees hanging from a cedar limb near my bee hives. It happened again yesterday when I spotted a small swarm clustered on a cedar...