In this unique series, you will learn the recovery stories of threatened animal species from around the world. Explore the dangers each species faces and meet the dedicated people working to protect animals and their habitats. Discover the challenges, failures, and ultimate success of each inspiring journey to bring a species back from the brink of extinction. The gray wolf is an essential species that keeps its ecosystem in balance. Discover how the gray wolf population, hunted almost to extinction in parts of North America, recovered due to successful reintroduction programs. A code inside the back of this book gives you access to videos and activities about the conservation of animals and ecosystems at www.crabtreeplus.com/animals-back-brink Book jacket.