Gila trout, a species threatened by climate change and worsening wildfires, persist in the Southwest with a big assist from volunteers.

An ecologist reviewing trail cam footage saw what he thinks was a female jaguar on the U.S.-Mexico border.

Arizona ranks second in the country for bat diversity, with a new species detected as recently as last year.

The Dragon Bravo Fire burned a high-severity path through one of only two streams that flow year-round on the North Kaibab, near the Grand Canyon.

The Interior Department released its two-year operating plan with the expected cuts on the lower Colorado River.

A judge denied the Tohono O’odham Nation's request to halt border wall construction through its tribal lands.

Over the last two years, federal water officials have released cool water from Lake Powell to thwart invasive bass spawning downstream. Not this year.

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The Bureau of Reclamation released its long-awaited Colorado River drought plan, targeting Lower Basin states for cuts.

Arizona cities banked Colorado River water underground when the river gave more than they needed. Now a pipeline will help get it where it's needed.

Arizona, California and Nevada face reductions in water supply as the Trump administration readies a Colorado River plan. More conflict lies ahead.

For only the second time in 122 years, the Charleston measuring gauge on the San Pedro River has registered zero.

Even the stop-gap solutions on the river carry a price. Hear from the people who are hit hardest.

The same 40 million people up and down the Colorado River are lining up for an ever-shrinking supply of water.

Fire survivors say “it’s morally reprehensible,” and experts worry the wagering could lead to arson.

The Dragon Bravo Fire burned across 150,000 acres and destroyed the historic lodge at the North Rim, but work to repair it started almost immediately.

This wildfire season, brushy tamarisks, also known as salt cedars, are a catalyst for Arizona blazes that foul the air with acrid smoke.

Thousands of sandhill cranes migrate across the West every year, but in a long drought, some are plotting new routes.

A Tucson couple has lived almost entirely on rainwater for two decades. Is their method part of Arizona's future?

A drought has a beginning and an end. What's happening in the West doesn't seem to have an end, so what is it?

Water levels at Lake Powell continue to fall as drought persists, pitting fish survival against power demands.

A Valentine's Day deadline will pass without shortage-sharing agreement among the seven Colorado River states, raising the specter of lawsuits.

The president signaled his intention to repeal the pollution rules more than a year ago.

The California condor nearly went extinct, and remains imperiled by the threat of poisoning from lead ammunition.

Farms and cities use so much of the Colorado River's water that little remains for the river's own ecosystem. Will negotiators save what's left?

Just as Southwest wildlife defenders were grieving wall construction in critical jaguar corridors, the government planned double the barrier.

The Yarrow's spiny lizard lives in a narrow band of the Mule Mountains, but its numbers are declining as temperatures warm and erase habitat.

People who live along the border watched their aquifers recede as the border wall grew. Now they fear it will happen again.

Arizona water finance board has advanced several desalination and conservation proposals that could bring trades for river water.

A migration corridor that allows jaguars and ocelots to cross into the U.S. is the latest border wall construction zone.

Western politicians and tech companies are pushing a "nuclear renaissance" to deliver power for artificial intelligence and data centers.

As it became clear the seven Colorado River states still had no shortage-sharing agreement, Gov. Katie Hobbs urged feds to act.

People who live along the uranium transport route say they want assurances that they are not at risk.

The deadly legacy of Cold War uranium mines looms over better regulated operations near Navajo Nation land in Arizona.

Los Angeles is set to double the size of a planned facility that will transform wastewater into purified drinking water, recycling enough water to meet the needs of 500,000 people.

The Dragon Bravo Fire destroyed Grand Canyon Lodge and with it one reason the North Rim closes in winter. What happens if it's open year-round?

Firefighting veterans believe the management team overseeing fire crews played a key role in handing team members over to immigration authorities.

Arizona tribal leaders reacted angrily after President Donald Trump said their opposition to a copper mine was un-American.

As Colorado River states race to finish a deal, water users face a resource altered by drought and climate change.

Political leaders seek an investigation into the Dragon Bravo Fire, but experts urge careful thought.

A pair of relocated beavers are helping restore disappearing wetland habitat along the San Pedro River in a new project by Arizona Game and Fish.

After the only known Mexican wolves were removed from Cochise County, calls for the species to be removed from federal protection are growing.

Arizona is tussling with other states over how much of the Colorado River it should receive. But how will Arizonans divide its share internally?

The Southwest and Rocky Mountain states are reviewing a plan that could split Colorado River water based on actual flows, not storage.

The Phoenix Zoo, with three government agencies, has sent 30,000 Chiricahua leopard frogs into wild habitat.

Tensions over the Colorado River have been red hot, but officials say heads have cooled and progress is resuming toward a shortage-sharing agreement.

As drought conditions sear Arizona, the state provides millions of gallons of water to wildlife in places where there is none.

The U.S. Supreme Court has turned down a request by Apache Stronghold to hear a case over a proposed copper mine at Oak Flat.

People who live near Bears Ears National Monument in southern Utah fear that the Trump administration will open land to energy development.