With their peculiar life cycle and strange appearance, amphibians are ripe for inquiry. This exhaustive introductory resource on frogs' habitats, behaviors, mating habits, and stages of growth uses bright, bold, large-scale photos that sometimes dwarf the accompanying text. Many pages are devoted to the complex life cycle of frogs, from egg to tadpole to froglet. Young readers will be intrigued by the truly odd adaptations that frogs enjoy, including using their eyes to breathe and swallow and their long sticky tongues. Differences between toads and frogs are explained, and a survey of common types of frogs from around the world is included. Environmental threats to frogs, such as pollutants, climate change, and habitat destruction, are discussed in the summary, and readers are reminded of the important functions that frogs serve in the balance of nature. An accompanying online teachers' guide aligns the book to Common Core standards, while a glossary of germane science terms makes this a quality resource for both formal instruction and pleasure reading.