invasive species

By removing invasive bullfrogs, scientists help Yosemite’s native turtles recover

The huge amphibians "will literally just feed on anything that fits into their mouth" — including turtle hatchlings. Clearing thousands of frogs from ponds helped other species stage a comeback.

This spiky-stemmed invasive grass is taking over Alabama

Classified as one of the worst weeds in the world, cogongrass aggressively crowds out native species and costs Alabama landowners tens of millions of dollars in lost revenue.