Minecraft bees in a nest?

An achievement says: Dismantle a bee nest with at least 3 bees.

I have several stacks of nests for some reason now. But there are only two of them everywhere.

How do I make them go from one nest to another? If I mine one, I'll be attacked and things will die.

I would destroy all nests except one so that you only have 2 bees left and these should then mate. Then the baby also belongs to the last nest so that you have 3 bees in one nest.

And how do I couple them?

You have to give both flowers like you would with cows or pigs