The bees in Oscar and Felix are good during the day when everybody is out gathering, but there is not quite enough room for everyone in the hive when the sun goes down. Nairobi is still waiting for new workers from the MN Hygienic queen I put in a couple of weeks ago, so it has no overcrowding/overheating problems. The pictures below were taken at 10:30pm. Oscar is stacked taller which might explain why there are more bees hanging out on Felix. Both hives have screened bottom boards.