With a population over 3 billion in the mid-1800s, the passenger pigeon was once the most abundant land bird in North America. Yet by the end of the nineteenth century it was extremely endangered, becoming extinct by 1914. Such a rapid decline has led many to ask what happened and what can we learn from this tragedy? The Project Passenger Pigeon site asks such compelling questions and offers some edifying answers. Readers should start with the About These Pigeons section to learn about how these fascinating birds flocked in epic numbers across North America, tracking unpredictable boons of acorn and other crops. The map feature, accessible from the homepage, highlights location-specific information about the pigeon, its habits, and its history. For example, selecting Wisconsin reveals historical accounts of the passenger pigeon in Wisconsin as well as a list of 17 places that were likely named after the bird. Readers have the opportunity to join the project, or simply peruse the website for its excellent educational content.