Ooh, very interesting. I've always found the sound of chittering insects terrifying, so I can definitely appreciate Eldarion's fear!

And he does have a lot of what we would call these days stress going on -- the birth of his child, the grief for his parents, the worry for his wife, the responsibility of a kingdom. The weight of the world does seem to be very much on his shoulders, and he's very young to deal with it. (Only 30? Aragorn and Arwen must have waited a very long time to have children after they were married!)