Jonathan McKnight is a biologist with the Maryland Department of Natural Resources.
The D.C. region is more than just a global gathering place for people -- it houses creatures from all over the world, too. And sometimes, that kind of globalization isn't a good thing. WAMU environmental reporter Sabri Ben-Achour brings us this story on the exotic -- and sometimes invasive -- species that have made their way to our area.
[Music: "Unwelcome Guest" by The Hotshot Freight Train from Poetic Devices & Personal Vices]