The three-toed sloth is topsy-turvy most of the time. The upside-down jellyfish rests on its back to feed. Skunks do stink-warning headstands and mallards upend in this colorful, interactive exploration of the hows and whys of upside-down animal behavior. In this unique pop-up book, pull tabs, lift-the-flaps, sliding doors, and other interactive elements, along with striking, texture-rich, cut-paper artwork by the Caldecott Honor artist Steve Jenkins to reveal how, for most animals, an occasional flip or dip is a matter of survival! (The fascinating glossary of twenty-six creatures is best read right-side up.)