Spruce bark beetle sinking its teeth deeper into Alaska’s forests
Spruce bark beetle dung, called frass, or “sawdust,” marks where a spruce bark beetle has burrowed under the bark of a spruce tree at Joint Base Elmendorf-Richardson, Alaska, June 6, 2018. Spruce bark beetles are attacking Alaska’s spruce tree population from the Kenai Peninsula to the Matanuska Valley and JBER. In the past 35 years, spruce beetle outbreaks have resulted in the loss of an estimated three billion board feet of timber in Alaska.

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Photo by: U.S. Air Force courtesy photo by Charlene Johnson |  VIRIN: 180606-F-FC540-1003.JPG