(cross posted in integrated pest management forum)

I've got ladybugs EVERYWHERE now. They are swarming around the doors and windows looking for a way in.
Is anyone aware of a way to keep them alive until next spring so that they can munch on the aphids in my garden?
It just seems a shame that so many will die when the temperature drops.

This spring I had asparagus beetles for the first time and purchased about a thousand lady bugs to keep the asparagus beetles in check. Now, when the garden is about done for the season, I've got an explosion of ladybugs.

Anyone got any ideas?