Occasionally at odds but more often in passionate agreement, birding journalist David Chandler and birding author Dominic Couzens present this checklist of the birds that each considers essential to see in the wild, from the Arctic Tern (at No. 100) to the Ivory-billed Woodpecker (No. 1). Every species enjoys a full page photo portrait, along with a second photo, range map, vital statistics, and a detailed description of its natural history—and why it made the list.