I looked up on the last day of July at the sound of purple martins, and instead of a swirling flock of feeding birds, I saw a line of the giant swallows flying south toward their winter home, perhaps ...

Every spring, migratory birds arrive in the continental United States from south and central America to breed. But precisely when they arrive each spring varies from year to year. In a NASA-led study ...

April has officially arrived, marking the peak time for spring bird migration. After a long and cold winter, many migratory ...

When the song pauses in a game of musical chairs, everyone jostles for one of the remaining seats. Bird migration today is much the same. When it’s time for a break in their biannual travels, ...