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Nature's Wood Carvers: Understanding Bark Beetle and Wood Borer Galleries

Similar to the work of Michigan’s native ash bark beetle, the image attached results from the activities of an ash bark beetle native to Europe. Photo by Gyorgy Csoka, Hungary Forest Research Institute,, provided under the Creative Commons Non-Commercial 3.0 License.

Have you have ever removed the bark from a log or dead tree and seen dozens of zig-zag tunnels etched in the wood?  Did you wonder who made them and what stories they tell?  Insect expert Bob Haack will answer these questions during a presentation entitled “Nature’s Wood Carvers: Understanding Bark Beetle and Wood Borer Galleries Friday, August 16, at 3:30 p.m. The presentation, free of charge, will be at Hessel School House. Donations are encouraged. The program is an offering by Avery Arts & Nature Learning Center.

The two-part event will include a one-hour lecture and a slideshow covering the life cycles of bark-and-wood-infesting insects. If weather allows participants will have the option to join Mr. Haack for a second hour at a local nature preserve, location to be determined, where participants will examine the influence of nature’s wood carvers on fallen trees and branches.

Participants will have to opportunity to examine several bark and wood samples that contain some of the more common etchings found in northern Michigan, including those made by pine bark beetles and the emerald ash borer.

Mr. Haack served as an entomologist for the U.S. Forest Service in Michigan for more than 30 years. 

To register contact Avery Arts & Nature Learning Center Director Paul Gingras at (906) 484-1333, (906) 430-2166, or Participants may also register by calling Hessel School House Administrative Director Kerri Smith at (906) 484-1333 or