In the wild, all animals struggle to survive. Many achieve this by living with those of its same species. But some know that the best way to stay alive is to approach other kinds of animals, sometimes very different, to find food, shelter or a safe place. In this type of relationship, the animals help each other to meet their needs, both obtaining benefit, like two good friends. Scientifics call this relationship mutualism, and this book presents a fascinating example, told in verse with the magic and rigor that characterize the informative texts of the incomparable Puerto Rican writer Georgina Lazaro.