A small amphibian rests in the water, a bird soars across the sky with prey clasped in its beak, a butterfly darts from flower to flower, and a snake slithers through the tall grass. Thousands of living things inhabit Earth, and each one has distinctive features that set it apart. In the Field Guides series, learn about hundreds of amphibians, birds of prey, butterflies, and snakes, and how to identify them in the wild. Book jacket.