claim: U.S. Forest Service data show pine beetle infestations have recently declined dramatically throughout the western United States.
evidence: A lodgepole pine tree with a pitch tube A lodgepole pine tree infested by the mountain pine beetle, with visible pitch tubes Invaded pine tree forest on the slopes of Chancellor Peak in Yoho National Park, Canada A pine tree forest north of Breckenridge, CO shows infestation in 2008.