[ It's an angel thing, if Dean hasn't figured it out already. The hive is Heaven, and the bees are angels, and Castiel thinks that if he can make the hive thrive, protect all the little drones, then maybe he can fix Heaven too, fix his family, or perhaps at the very least learn enough about what bees do right to figure out what Heaven is doing so wrong.

In any case, he gives his head a slight shake. ] They won't be interested in you. So long as you treat them with respect, they'll leave you be.

[ He tips his head toward the tree. ] I'll need to climb up. If anything comes for you in the meantime...

[ Not like he needed to tell Dean to kill the zombies that tried to eat him. Not really. ]