ALT A map of the United States show different colors that represent bird migration numbers. The bright yellow and orange areas on the map indicate high levels of birds migrating. The purple and pink areas of the map represent low levels of birds migrating. The map shows the central and eastern half of the country with high levels of birds migrating through. The map shows many western states with low levels of migrating birds. Text on the images shows the date of April 29, 2024 and number of birds predicted to migrate on that date, which is 353 million birds.