My friend who introduced me to beekeeping is on holiday for a couple of weeks, and a day or two before he left he called asking for my long ladder since one of his hives had swarmed. Yesterday, he called from holiday and asked me to go up to see his neighbour, who was reporting swarmlike activity in her back yard. By the time I got up there (which was several hours after she'd left a message for him) all that was left was about 20 bees clustering on a branch in her yard - I thought they were probably sniffing where a queen had been some hours prior. In any case, his hives (there are 4 strong hives, and now 2 very sparsely populated ones) have LOTS of space. He has 3+ supers on the strong hives, and on the one empty hive one super and the next empty one has two. These are all from packages installed this spring, and he put extra supers on all of them just before going on holiday to make sure they didn't run out of room. We talked about this and figured the worst that would happen would be they'd fill up the top super and live some in between empty - not a big deal. We're in the middle of a hot summer with no relief in sight, so cold nights were not a concern. However, it got me to wondering - can too much space cause as much trouble as too little space?