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Modifications
© SVS/BirdLife Schweiz, Zürich /http://www.birdlife.ch/content/totholz-lebensraum-fuer-5000-arten-gefaehrdet / CC BY-NC-ND 2.0 This image has been modified
© SVS/BirdLife Schweiz, Zürich /http://www.birdlife.ch/content/totholz-lebensraum-fuer-5000-arten-gefaehrdet / CC BY-NC-ND 2.0 This image has been modified