Purple Martins are songbirds that spend winters in South America and summers in North America. On the east coast of the U.S., they also happen to breed exclusively in human-created nests.
In this short documentary from NPR, Adam Cole tells us the history of this bird, then tries to track down a giant flock in South Carolina...but the flock is missing. Ready for some American birding history? Interested in creating houses for songbirds? Want to see where the Purple Martins ended up? Check this out: