Board Thread:Monster Discussions/@comment-5989773-20131230213613/@comment-4883149-20140428051852

We've seen in many trailers that they lay eggs, and they're the same species. They share a lot of the same physical features like the eyes, and their limbs. The only differences between the two are the massive size difference and that the smaller MUTO's 2nd set of "arms" have become wings. Oh and their jaw structure but it's a really tiny difference.