WHEN THE WOLVES RETURNED

The original mission of Yellowstone, the world’s first national park, was people’s enjoyment of its geologic wonders. Unaware of the intricate balance of nature, the U.S. government supported the extermination of wolves there, and by 1926 they were all gone. In this account, a profusion of wildlife photographs, most by the Hartmans, illustrates the resulting changes in the ecosystem and the return to balance since wolves were reintroduced the 1990s. Supporting the historical background are black-and-white National Park Service images. The narrative proceeds on two levels, a simple boxed text on the left-hand page suitable for reading aloud with more detail in a paragraph on the right. The description of the welcome restoration of equilibrium is reinforced by a double-page spread at the end of the book asking readers to recall the wolf effect on each living thing pictured. Pair this with Jean Craighead George’s The Wolves are Back (2008) for contrasting but equally effective approaches to this piece of ecological good news. (bibliography, index) (Picture book/nonfiction. 6-10)