A spruce under attack by the spruce beetle, however, can seem healthy enough, Grand Valley Ranger District Forester Christie LaDue said. The needles on affected trees will turn gray, but the effect is ...

Along with the tourist crowds that are flocking to Denali National Park and Preserve is another arrival: Masses of beetles have burrowed into the park’s spruce trees and begun killing them off. The ...

Nature gives rise to fascinating adaptations, which can sometimes lead to organisms living in some strange situations. The relationship between bark beetles, spruce trees, and a type of fungus is a ...

Rising temperatures across North America are accelerating beetle reproduction and survival, leading to widespread forest destruction. Mountain pine beetles, spruce beetles, and other pests have ...

A new machine-learning system developed at the University of Alaska Fairbanks can automatically produce detailed maps from satellite data to show locations of likely beetle-killed spruce trees in ...

Another 338 square miles of high-altitude forests in Southwest Colorado fell to the spruce beetle outbreak in 2013, according to an annual aerial survey of Colorado’s forests. The bugs are now firmly ...

The Town of Vail will begin the removal of approximately 26 spruce trees in the vicinity of the Grand Hyatt in Cascade Village starting on Monday, Oct. 7. The dead and dying trees have been identified ...

Douglas-fir beetles target larger Douglas-fir and western larch logs greater than 12 inches in diameter. These beetles ...