Caption: Standing dead trees, known as snags, play an essential role in the health of forest ecosystems, according to Brian Wing, a research forester with the U.S. Forest Service. He developed a method using airborne lidar data to detect individual snags, such as this dead lodgepole pine killed by beetles in the Three Sisters Wilderness. - The Bulletin file photo
Album ID: 1575668
Photo ID: 45047785
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