Bark beetle gallery in Fraxinus excelsior

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Description: English: Bark beetle (Hylesinus fraxini) gallery on ash wood. The ash (Fraxinus excelsior) has been felled and was then attacked. Deutsch: Bohrgänge eines Borkenkäfers (Bunter Eschenbastkäfer, Hylesinus fraxini) auf einem Eschenstämmchen (Fraxinus excelsior). Die Esche wurde vor dem Befall gefällt. Date: 2 January 2015. Source: Own work. Author: Simon A. Eugster. Other licensingIf you wish to use this picture under a different license, e.g. for a book, please contact me.