Dealing with a swarm of bees that settled under your bottom board

In this video, we talk a little about queen excluders and how they can cause your bees to swarm because they do not allow the bees to expand the brood chamber. A busting box of bees can easily outgrow two deep chambers. We also hive a swarm of bees that took up residence underneath one of the hives. This is a common scenario that can be the result of several things. Two that come to mind are 1. the bees start to swarm, and then either change their mind or the weather prevents them and they'll take cover under the hive if the space allows. 2. Secondary swarms that are usually smaller in numbers than a primary and the result of multiple queens emerging out of cells all at one time. While a few queens will stay and battle it out, secondary and tertiary swarms will just take off with however many bees will follow to form a new colony elsewhere. BTW, I didn't end of killing the queen to re-combined the bees. I found she was mated (so, likely the original mother) I caged her with some attendants and offered her to another beekeeper in need of a mated queen.