Gray wolves used to roam most of North America before being hunted, trapped and driven out of most of the continental U.S. by the early 1900s. They are native to California.

Researchers in upstate New York are working to rehome some tiny, rare snails. Understanding their decline could help mitigate broader climate changes.

There were only an estimated seven red wolves left in the wild when a coalition of conservation organizations decided to sue the U.S. Fish and Wildlife Service.

The four-legged creatures with digestive tracts of steel make easy work of consuming vegetation that typically fuels wildfires.

The Biden administration is moving ahead with what could be the largest national marine sanctuary in the continental U.S. A Native American tribe is hoping to be partners in managing it.

Bear 64F is believed to be one of three animals who've broken into dozens of homes in South Lake Tahoe in the last year and helped themselves to messy meals, enchanting the internet.

Authorities have been unable to find the bear that killed a woman near Yellowstone National Park late last month. The attack has renewed calls to take grizzlies off the endangered species list.

The USGS wants to test if butterflies and other insects are being hurt by contaminants, such as those in pesticides. It's seeking specimens from Alabama, Georgia, Kansas, Nebraska, Oklahoma and Texas.

You don't even have to own one. Research shows just 5 to 20 minutes interacting with other people's pooches can reduce stress hormones and increase well-being.

Zoo Atlanta has begun construction on a new $22 million veterinary complex, the Rollins Animal Health Center.

The disease known as sleeping sickness is on the decline but remains a concern in Africa. Now there's a theatrical event aimed at keeping the numbers down.

A nematode found deep in frozen sediment has proven its ability to survive extreme environments long term. Scientists studying the species say their work could inform the protection of other animals.

Great white shark populations have been difficult to track around Cape Cod due to the species' elusive nature and smaller populations, according to researchers.

After a pod of nearly 100 pilot whales beached themselves on Tuesday, more than 50 of them died overnight. Now officials say the remaining 47 will be euthanized.

The incident is reminiscent of one in September, in which some 200 pilot whales died after a pod stranded itself on the remote west coast of Tasmania, off Australia's southeastern coast.