San Juan Capistrano is also known for its cliff swallows. The protected birds return during migration, which originates in the town of Goya, Argentina, around St. Joseph's Day (March 19) each year. The day is celebrated by the city's annual Swallows' Day Parade and other festive events. The swallows leave around October 23, the former feast day of St. John of Capistrano. The 1940 hit song "When the Swallows Come Back to Capistrano", written by Leon René, is a love song inspired by this annual event.