"You can't make some of these things up that we've seen," biologist Ian Bartoszek told us. "It almost reads out of a sci-fi novel."

We spoke with Bartoszek, Prof. Joel Trexler of Florida International University and Carrie Brown-Lima, director of the New York Invasive Species Research Institute about the threat invasive species present.

Want to support 1A? Give to your local public radio station and subscribe to this podcast. Have questions? Find us on Twitter @1A.