One of the dominant tree species in our Colorado Rocky Mountain ... with the inner bark tinged pink, while the bark of the Engelmann spruce is light brown to grey with inner bark silvery.

Each bark beetle species specializes in attacking—and usually ... causing outbreaks which kill large numbers of even the healthiest trees. These large, healthy Engelmann spruce and subalpine fir trees ...

Fir trees have a smooth silvery gray bark with ... size according to species. These details make distinguishing firs from spruces rather easy. Because both blue spruce and Engelmann spruce are ...

Spruce beetles the size of rice grains eat inner bark of high-elevation Engelmann spruce trees, their primary host, and also blue spruce trees. They’re among more than a dozen insect invaders ...

DENVER — The bark beetle outbreak ... 40 percent of the spruce and fir forest have been affected. Approximately 178,000 acres of high-elevation Engelmann spruce trees were affected by beetles ...

In fact, Engelmann spruce and subalpine fir trees failed to recover in 74% of the 45 sites sampled. "Bark beetle outbreaks have been killing lots and lots of trees throughout the western United ...

The spruce genus Picea has about 14 species inhabiting ... varies considerably from tree to tree with the bluest being more true to color when propagated by grafting. Engelmann's spruce (Picea ...

Eurasian spruce bark ... tree death. And they ... When southern Rocky Mountain forests are viewed from a distance these days, it may not look like much is left. Large swaths of dead, standing ...

Each bark beetle species specializes in attacking—and usually ... causing outbreaks which kill large numbers of even the healthiest trees. These large, healthy Engelmann spruce and subalpine fir trees ...

Several species of bark beetle are native to Colorado ... which kill large numbers of even the healthiest trees. These large, healthy Engelmann spruce and subalpine fir trees are the ones that ...

Several species of bark beetle are native to Colorado ... which kill large numbers of even the healthiest trees. These large, healthy Engelmann spruce and subalpine fir trees are the ones that ...