Driving through the west entrance of Glacier National Park in Montana, visitors are greeted by a faint etching of a mountain goat on the bottom corner of the welcome sign. The park's makeshift mascot, known for its pristine snow-white coat and ability to traverse rocky, steep terrain, is now navigating a different kind of obstacle.
Over roughly a decade, mountain goat numbers across the study sites declined by 45 percent, from 2008 to 2019, acc…