Early Action Key in War Against Invasive Species Foreign life forms ranging from the dreaded zebra mussel to mute swans are taking over the American countryside. Biologists haven't had much luck in their fight to stop this "silent invasion," but the battle isn't over yet. NPR's John Nielsen reports.
NPR logo

Early Action Key in War Against Invasive Species

  • Download
  • <iframe src="https://www.npr.org/player/embed/3879383/3879384" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
Early Action Key in War Against Invasive Species

Early Action Key in War Against Invasive Species

Early Action Key in War Against Invasive Species

  • Download
  • <iframe src="https://www.npr.org/player/embed/3879383/3879384" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">

Thousands of mute swans are wreaking havoc on the Chesapeake Bay, eating up native plants and pushing native animals out of the ecosystem. Corbis hide caption

toggle caption
Corbis

Thousands of mute swans are wreaking havoc on the Chesapeake Bay, eating up native plants and pushing native animals out of the ecosystem. Corbis hide caption

toggle caption
Corbis

Thousands of acres of American countryside are lost to zebra mussels, snakehead fish and other "invasive species" each year, but the war isn't over yet. NPR's John Nielsen has this report on small victories on the invasive species battlefield.