Ponderosa pine forests in the Sierra Nevada that were wiped out by western pine beetles during the 2012-2015 megadrought won't recover to pre-drought densities, reducing an important storehouse for ...

Warming winters have allowed mountain pine beetle outbreaks in the coldest areas of the western United States, but milder winters can't be blamed for the full extent of recent outbreaks in the region, ...

Add Yahoo as a preferred source to see more of our stories on Google. A western pine beetle rests on a sap mound on a pine tree. - Charles Wollertz/Getty Images A thriving pine tree is a thing of ...

Now that the mountain pine beetle has chewed through some 70,000 square miles of forest in the western States and Canada, it seems the voracious pest is expanding its palate. Beetles in Canada were ...

A mountain chickadee peers down from its perch in a ponderosa pine. Click here for larger image. Photo by Jeff Mitton. As the most recent glaciers subsided, ponderosa pines move north from their ...