From birth and adolescence to having their own young, animals have a fascinating cycle of life. While the fruit fly lives for less than a month, others, such as tortoises, can live for over a hundred years. In this engaging book, readers are introduced to several different animals and discover what happens over the course of their lives.

Includes index.

What is a life cycle? -- Mammal life cycle -- Pocket babies -- Bird life cycle -- Amazing egg cases -- Parenting in the oceans -- Frogs and toads -- Underwater babies -- From egg to a butterfly.