A vast flock of purple martins has made Nashville’s symphony center its staging ground for the fall migration. It’s not just the city’s problem. It’s a human problem.
Bird-watchers love to see vagrants, or birds that have traveled far outside their range. But scientists say they have a lot to teach us in a world facing ecological change.
The only place in the world where the species is found is on 760 acres of wetlands about 100 miles east of Reno, Nev., near a renewable energy project.