Echidnas are part of the monotreme family. This strange family of mammals are the only mammals on earth that lay eggs! Just like the platypus though, echidnas have an even stranger skill. Echidnas can sense small electrical pulses from other animals. Through this book's full color photographs of echidnas in the wild, paired closely with easy-to-understand text, young readers will love learning how the echidna uses electricity to find insects deep underground.