That’s when he found out about beetle kill pine. Since the early 2000s, Colorado has faced epidemic levels of bark beetles, which bore into trees and ultimately kill them. One species ...

The mountain pine beetle is recognized as the most destructive of western forest insects, but the magnitude of this epidemic is already ten times larger than the greatest epidemic previously recorded.

"So many people worked to preserve the pine barrens," said one fire manager, "and along comes an insect the size of a grain ...

Even the few species that do kill trees tend to target highly stressed ones. The mountain pine beetle is the bad bug of the bunch. Given the right conditions, it can ravage one healthy tree after ...