The greenback cutthroat trout, considered extinct for 85 years, was found naturally reproducing in Colorado waters after more than a decade of conservation efforts, officials said. Photo from Colorado ...

For the first time in 30 years, the Missouri Department of Conservation has confirmed evidence that the state-endangered lake sturgeon is reproducing in the wild. Sam Hardy and Kristin Biagioli ...

Southern Illinois University-led research has found an established population of black carp in parts of the Mississippi River basin, according to a Dec. 13 U.S. Geological Survey announcement. The ...