Cover: Three species of introduced rats (middle, left to right), Rattus exulans, R. rattus, and R. norvegicus, surrounded by images of their effects on nesting seabirds. Rats prey on seabirds of all sizes and life stages, from an adult of one of the largest seabirds (Laysan Albatross, top left) to the eggs, chicks, and adults of one of the smallest seabirds (Least Auklet, top middle, bottom left, and bottom right). Photos of rats by (left to right) Dick Veitch, Rex Williams, Elisabeth Bell. Other photos (clockwise from top left) by Mark Rauzon, Island Conservation, Elizabeth Bell, Ian Jones, Island Conservation, Ian Jones. See pages 16-26.