We had a beautiful 77 F (25 C) Saturday and I took the opportunity to check my hives and reverse the boxes. For the most part the bees were gentle and busy with their work. Reversing is a method of moving lower boxes with little or no resources (especially no brood) to the top. This puts the brood nest lower in the hive and encourages the colony to build out honey stores above.
In theory this helps prevent swarming, and it does seem to delay it. Here are a couple pictures from my afternoon.
I took a 90 minute break after Eris (the fifth of my eight hives) to let the bees settle down. The final three hives (the three Langs in the back of the above picture) were active but not overly aggressive.