Bye-Bye Birdies

San Juan Capistrano, in California, has a huge population of cliff swallows. Every year, the birds leave around the same time, to migrate south. 6000 swallows leaving at once, is quite a spectacle, so the town celebrates Swallows Depart From San Juan Capistrano Day. After they winter over in Goya Argentina, the swallows will return.