Bison in Theodore Roosevelt National Park, N.D.
Scientists have tracked endangered species for years. Now they're figuring out how to highlight animals and plants that have recovered – but what does that mean?
Steller sea lions in the eastern Pacific are an Endangered Species Act success story.
David B. Ledig/USFWS
The Trump administration is changing implementation of the Endangered Species Act in ways that conservationists say would reduce protection for some of America's most threatened wildlife.
Doug Ford’s government is weakening environmental laws in Ontario — leaving wildlife and environments with no protections.
Doug Ford's government is undercutting the environment by giving business and development the upper hand.
Only about 411 North Atlantic right whales exist, so every animal lost is a blow to the species’ chance of surviving.
(c) Nick Hawkins
North Atlantic right whales are headed toward a traumatic extinction, but could rebound if humans can get out of their way.
Female sage grouse at the Seedskadee National Wildlife Refuge, Wyoming.
The Interior Department is expanding oil and gas leasing on land in six western states that is vital habitat for the greater sage grouse. Lawsuits are certain to follow.
The Endangered Species Act was enacted in 1973 partly to help save the bald eagle, the U.S. national symbol, from extinction. Should public appeal influence which species get priority?
How should the US spend limited funds for conserving endangered species? A new data tool lets managers compare different strategies so they can allocate money to protect the most species.
Green sea turtle.
Little chunks of plastic are now scattered throughout the oceans and pollute most beaches around the world, including the nesting sites of threatened and endangered sea turtles.
Male sage grouse at the Seedskadee National Wildlife Refuge, Wyoming.
The Trump administration is reopening a plan negotiated under President Obama to protect Western sage grouse. This could signal to states not to bother working together to protect other endangered species.
Wild bumble bees provide natural pollination for blueberries in North America.
Honeybees receive a lot of attention, but the first North American bee to be listed as an endangered species is a wild bumble bee. Wild bees are vital pollinators, and some are declining rapidly.
The CSIRO has provided new estimates of population sizes for White Sharks in Australian waters.
How many shark encounters have there been at your local beach? Explore our interactive map to see 20 years of incidents between humans and sharks in coastal waters around Australia.
Utah prairie dog, Bryce Canyon National Park.
Congress is moving to cut back the Endangered Species Act and give more power to states. But a recent study shows that state laws are weaker and states have few resources to protect species at risk.
A little protection over here, please?
AP Photo/Harry Hamburg
Giraffe populations have declined by more than a third over the past 30 years. Two wildlife law experts explain the protections that would come with including them on a US list of endangered species.
Beach closed to protect threatened bird species, Chincoteague, Virginia.
Congress is considering proposals to amend the Endangered Species Act. In this roundup we offer views on what's lost when species disappear and the complexities of bringing them back from the brink.
The Trump administration will review the status of The Bears Ears National Monument in Utah, one of the country’s most significant cultural sites.
Bureau of Land Management
Trump wants to scale back national monuments on federal lands in the name of boosting the economy. But this would undo decades of investments to manage our cultural and ecological resources.
Bald eagles are the best-known example of a successful recovery under the Endangered Species Act.
Critics say the Endangered Species Act does not work because only about 1 percent of protected species have officially "recovered." Two biologists explain why recovery is so hard to define.
U.S. Rep. Ryan Zinke campaigns for reelection in Billings, Montana, October 20, 2016.
AP Photo/Matthew Brown
If US Rep. Ryan Zinke of Montana is confirmed as interior secretary, he will face difficult choices about balancing extractive activities like energy production with conservation on public lands.
The grizzly, or brown, bear in the Greater Yellowstone Ecosystem is posed to lose protections under the Endangered Species Act.
Jim Peaco, Yellowstone National Park
The grizzly bear of Yellowstone is expected to be delisted from the Endangered Species Act. But a survey of grizzly bear researchers finds flaws in how wildlife experts evaluate scientific data.
An icon, and perhaps casualty, of California’s contentious water policies.
US Fish & Wildlife Service
The Endangered Species Act may stave off extinction for the Delta smelt in California, but will it help this threatened fish – or any other at-risk species – recover and thrive again?