Border Wall

The public has long supported a state program to provide water for wildlife, but now human threats, including border-wall construction and climate change, are making a bad situation worse.

The decline of a rare cactus in a national park epitomizes the Trump administration’s failure to protect endangered species along the border.

Residents of southern Arizona are protecting jaguar habitat and creating jobs in the hopes that a restoration economy can beat an extraction economy.

When big cats cross from one country into another, they can fall victim to wildlife traffickers, drug cartels, highways and more emerging threats.

How will the border wall affect jaguars, bears, birds, bees and other wildlife? And what other solutions might work better without harming people or ecosystems?

Decades after being wiped out in the Lone Star State, black bears are slowly returning. Experts fear that a border wall between the United States and Mexico would end that recovery.

Environmental and constitutional law scholar Dan Farber explains what a climate change emergency declaration could achieve.

What border communities really need are solutions to address economic, health and climate problems — and the mesquite tree can help.

President Trump’s invocation of a national emergency to build his border wall is worrying and “illegal,” according to scholars.

Experts warn that the shutdown has furloughed or hobbled personnel responsible for diagnosing and detecting wildlife diseases.