Matricide?

This is a fascinating video of what's called "balling" a queen bee--killing her, but clustering around her and vibrating, giving off enough heat to do her in.  She has lived out her useful life, and the hive starts to see her as an intruder, since she has stopped producing the important pheromones that signal her status as their queen.

I'm not at the level of beekeeping where I'd be willing to pick up this mass of bees with my bare hand.  Maybe some day.

(Thanks, Marcia!)