Trump Wants a New Border Wall. It Would Block a Key Wildlife Corridor.

A Trump administration plan to build 25 miles of wall along a remote stretch of rolling grasslands and mountains in Arizona would block one of the largest and most important remaining wildlife corridors on the state’s border with Mexico, according to a report this month by the Center for Biological Diversity, a conservation group.

“A barrier here would block species movement, destroy protected habitats, and inflict irreversible damage on critical ecological linkages,” the report said.

Wildlife cameras have photographed 20 species of wildlife moving freely across the border in this area — including black bears, mountain lions and mule deer — movement that would be sharply curtailed by the planned 30-foot-tall wall, researchers say...