Hellbenders are the largest salamanders in North America and can grow up to 29 inches, according to the U.S. Fish and Wildlife Service.

The Endangered Species Act of 1973 created two distinct lists for protection. Species in imminent danger of extinction throughout all or most of their range were to be listed as “endangered,” and ...

The genome of a once-endangered songbird shows extensive signs of inbreeding, according to a new study by Penn State ...

If a new proposal is adopted, the insects would become the most commonly seen species to be the subject of federal protection ...

The United States is moving to grant federal protections to the monarch butterfly -- a once-common species recognizable by ...

After a decade of advocacy, the species could now qualify for federal protections under the Endangered Species Act.

The Endangered Species Act, enacted in 1973, establishes protections for fish, wildlife and plants that are listed as threatened or endangered. Under the act, federal agencies are required to ...

Monarch butterflies are familiar sights to many Oklahomans because of their yearly migration through the state in the fall ...

The major U.S. Fish and Wildlife Service’s proposal would declare the iconic species as threatened, with federal scientists ...

Marine invertebrates, however, don't often get the same attention — and researchers are working to change that. Giant clams ...

The red-cockaded woodpecker in the Southeast is no longer federally endangered, thanks to decades of conservation work; the ...

The federal government has proposed listing the monarch butterfly as threatened under the Endangered Species Act, a step ...