eBird is a citizen science project that collects data about bird sightings from bird watchers around the world. The millions of observations recorded each month, logged into a central database at the Cornell Lab of Ornithology, are enabling a global understanding of the distribution, abundance, and movements of thousands of species of birds. The information is used by scientists, land managers, and bird watchers to document changes in bird distributions, pinpoint bird populations in need of conservation, and locate cool places to find new birds. Bonney will trace the origin, evolution, and current use of eBird and show how it is being used not only at the global level, but locally in the greater Los Angeles area.