Do we know what their nests look like? For a little project of mine, I was searching for it and only found a few mods screenshots and fan art. Any obscure concept art where you see one or a book where they describe it for a few lines?

You can always try to ask Michael kirkbride himself. He is one of the masterminds behind Morrowind.

He has an active tumblr for various ElderScrolls art and lore pieces and also he used to answer questions in Reddit.

Google search Michael kirkbride tumblr.

Go right for the source, huh? That's an excellent idea. Thanks!