What's one of the slowest mammals around? Sloths! These mammals move so slowly, algae grow on their backs. This doesn't bother the sloth though. In fact, it helps them to camouflage! While they have long claws, sloths prefer to lounge around, sleeping for most of the day and rarely leaving their trees. In this book, readers see cute photographs of wild sloths and discover how and when they eat, how they sleep, and how people are helping them in the wild.