Best available science or best possible? Conservationists say the latter could mean doom for many species on the brink.

Silverspots are listed as threatened, a designation that conservationists say falls short of what's needed to rescue the species.

We are on the cusp of losing the integrity of one of the most significant environmental acts ever enacted in the United States. Why should this matter? As the Pulitzer Prize-winning evolutionary ...

The bald eagle, American alligator and Louisiana black bear are just three of the nearly 300 species revived by the Endangered Species Act -- 50 years since it first took affect. The Endangered ...

The Olympic marmot is endemic to the mountains of the Pacific Northwest and have faced threats from climate change and coyote ...

The proposal is among the more high-profile actions taken under the Endangered Species Act by the Trump administration, which ...

The International Union for Conservation of Nature, or IUCN for short, is one of the most powerful wildlife organizations. It ...

Livestock associations are questioning whether Colorado Parks and Wildlife violated the federal Endangered Species Act when ...

The Biden administration is being criticized for lack of urgency. Species that once thrived in North America are are rapidly on the way to becoming extinct, and as conservationists work to prevent ...

President Obama on Tuesday overturned a last-minute Bush administration regulation that many environmentalists claim weakened the Endangered Species Act. The regulation, issued a few weeks before ...

We are on the cusp of losing the integrity of one of the most significant environmental acts ever enacted in the United States. Why should this matter? As the Pulitzer Prize-winning evolutionary ...