the Caterpillar is mentioned in chapter 4 and 5 of the book “Alice’s Adventures in Wonderland”. He is sitting on a mushroom while smoking a hookah, when Alice first meets him. Although he is rather strict and not very friendly, and corrects Alice’s recitation of a poem, he does help her by advising her to eat from the mushroom if she wants to change her size. In the end, he crawls away. In Disney’s cartoon movie, however, he changes into a butterfly.