In 1993, the Smithsonian Migratory Bird Center created International Migratory Bird Day (IMBD). This educational campaign celebrated its 25th year in 2018. In 2018, many organizations joined forces to create a single, global bird conservation education campaign, World Migratory Bird Day (WMBD). This new alliance furthers migratory bird conservation around the globe by creating a worldwide campaign organized around the planet’s major migratory bird corridors, the African-Eurasian flyway, the East Asian-Australasian flyway, and the Americas flyway. By promoting the same event name, annual conservation theme, and messaging, we combine our voices into a global chorus to boost the urgent need for migratory bird conservation.