The Appalachia + Mid-South Newsroom Presents: Signal Species

What can wildlife tell us about our ecosystem — and will we listen?

A composite image featuring four things: kudzu, black bears, armadillos, and bats.
The Appalachia + Mid-South Newsroom and our partners are exploring what wildlife can tell us about our environment. Photo Credit: WPLN News

A “signal” or “indicator” species is an organism that can tell us about changes occurring in an ecosystem.

We’re talking bears encountering humans more frequently, armadillos moving farther north, invasive vines like kudzu growing at accelerated rates and bat populations dwindling.

These are all examples of species sending us signals about our changing world and climate — but are we paying attention? And if we are, is there a way to contribute to scientific findings? (Spoiler alert: Yes! iNaturalist will be entering the chat.)

The Appalachia + Mid-South Newsroom and our partner stations in Tennessee, Kentucky and West Virginia are bringing you answers through a series of features all about wildlife. We’ll publish a new story each Monday in June, with full episodes of WPLN’s This Is Nashville dedicated to the series airing on June 2 and June 23.

Stories

Giselle Rhoden,Jun. 17, 2026

Cute But Not So Cuddly, Armadillos Are Making Their Way North

The nine-banded armadillo has become an indicator of rising temperatures in Kentucky and the surrounding region, as the species moves farther north.

Jacqui Sieber,Jun. 08, 2026

How Kudzu Became The ‘Vine That Ate The South’

Kudzu is an invasive vine that’s become a persistent problem in the American South. But there are efforts to tackle it.

Caroline Eggers,Jun. 01, 2026

Black Bears Are Threatened By Climate Change. How Can We Help?

Black bear encounters are on the rise in Tennessee, and climate change is often a hidden culprit, tampering with ecosystems in unexpected ways.

This is Nashville episodes


June 2: Taking cues from black bears and other signal species
Coming June 23: How citizen scientists can document signal species


Reporters: Catherine Eggers, Jacqui Sieber, Giselle Rhoden, Eric Douglas
Producers: Megan Jones, Andrew Henderson, Jared Kunish
Editor: John Boyle
Additional editing: Tony Gonzalez, Megan Jones, Tasha A.F. Lemley.


This series was produced by the Appalachia + Mid-South Newsroom, a collaboration between West Virginia Public BroadcastingWPLN and WUOT in Tennessee; LPMWEKUWKMS and WKU Public Radio in Kentucky; and NPR. Sign up for the weekly Porch Light newsletter here for news from around the region.