This is me reversing the brood chambers on an early spring honey bee hive to prevent swarming. But really it’s an excuse to do the first full hive inspection of the year and give the bees some honey.
May 2019 Postscript: I’m not as keen on reversing my hives like this anymore. I often reduce my colonies to single deeps in the spring when the clusters are small (3-5 frames wide) because they seem to build up faster in single deeps. But I avoid placing a deep above a small cluster because it messes up the thermodynamics of the hive and the bees are often forced to move to the empty top deep to stay warm, especially when the outside weather is still freezing. It’s not so bad once all the frames in the single deep are packed with bees, but reversing may not be the best move for colonies with small spring clusters.