This is pretty cool!

Unsure where you are but if it’s winter there’s a good chance these girls aren’t going to make it.

If it’s summer, then they’ll probably have a good nest. This is going to be filled with comb, honey, and larva before they’re done with it. (It can happen really fast). Since it doesn’t look like a large spot, I’d expect them to throw off another swarm before the season is out.

The downside is that bees have a tough time without treatment for mites… which means this colony might make it through this year but will likely start having some issues after that.