In northern Yellowstone National Park, saplings of quaking aspen, an ecologically important tree in the American West, are being broken by a historically large bison herd, affecting the comeback of ...

The restoration of gray wolves in Yellowstone National Park has helped revive an aspen tree population unique to the region, a new study has found. Quaking aspen, one of the few deciduous tree species ...

Pine needle scale has become a common problem the past several years in the area. This insect is a problem on Austrian, ponderosa, scotch and mugo pines. The adult scale is a small black (there's a ...

image: A bison bull breaking aspen saplings and eating aspen in the Lamar Valley in northern Yellowstone National Park. Overstory aspen trees have died and fallen to the ground as seen in the photo, ...