Lead poisoning, which nearly killed off California condors, still threatens the birds
In the Galápagos Islands, scientists are struggling to save some of the most endangered creatures in the world.
The U.S. bald eagle population is on the rise.
Can livestock and predators share the same land?
Sportfishing can account for a surprisingly large part of the catch of certain types of saltwater fish.
Tigers are among the most endangered animals on Earth.