April 21, 2022 | 7:57 AM
New study takes close look at where to protect at-risk species
Rare species in Pennsylvania include six types of federally endangered freshwater mussels found in the Allegheny and Delaware rivers.
tag | endangered species
November 4, 2019 | 3:31 PM
What can be saved? Gorillas rise against the odds
By The Associated Press 
