Dear Bee-liners, Has anybody among you ever overwintered an observation hive indoor ? or are there any information, published or otherwise on this matter ? we are trying to overwinter 2 hives here in midwest (Illinois). what would be the opt imal temperature ? on a related matter, what is the minimal number of bees that is required t o readily thermoregulate ? 50 ? 500 ? no idea. Any comment would be appreciated. Yours Zhiyong Huang.