Fifty thousand years ago, North America was home to towering giants. Mammoths roamed the tundra, saber-toothed cats hunted in ...

The private company Colossal Biosciences claims to have resurrected dire wolves through genetic editing. The resulting trio, ...

Scientists say the Trump administration’s embrace of de-extinction won’t help endangered species like the Great Lakes gray ...

For the 40th year, the nonprofit has put out its list of "America's Most Endangered Rivers," a call ... as well as the species that inhabit it. "The stunning Clearwater River Basin in the Nez ...

The Endangered Species Act defines “take” as “to harass, harm, pursue, hunt, shoot, wound, kill, trap, capture, or collect, ...

The Passaic River is listed as the fourth-most-endangered river in the country ... by more than 2.5 million residents across North Jersey, the American Rivers report says. Before European ...

High fledgling survival in American Kestrels suggests adult mortality and migration risks may better explain their population ...

In North American marine waters, at least 82 fish species are imperiled. Across the globe, 1,851 species of fish — 21 percent of all fish species evaluated — were deemed at risk of extinction by the ...

Ornithologist Bruce Beehler tracks down what he calls the “Magnificent Seven,” a charismatic group of migratory birds, in his ...

Editor's Note: In “The Lost Parrot,” we mistakenly characterized the Carolina parakeet as “North America’s only native parrot species.” In fact, the endangered thick-billed parrot ...

The first Trump administration built long segments of steel wall on Arizona's border. Conservationists fear wildlife will ...

The American genetic engineering firm Colossal ... These animals have also been hit hard by humans, and many species went extinct in the past few tens of thousands of years. Each time our ...