A couple days ago I have 5 virgins hatch in my little nuc (one swarmed to a neighbor's tree where I "rescued" them). I heard a lot of piping in the nuc and thought I'd do some research about it. In the video below (not mine), the queens start piping a couple minutes into the video. It was pretty neat to hear them piping to each other.
Here is some more info:
Thank you, Sierra. Thank you. I've watched a # of videos, read blogs, and looked up in my books. It's yet another miracle. Again, thanks.
Love the video. Learned another thing about bees today. Piping, didn't know. Will have to keep my ears attuned. Thanks, Sierra, for sharing.