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Résumé :
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Observations were made in 2002 at the only powerful windmills installed in the Walloon region at that time, at Saint-Vith (Ardennes) and Perwez (Hesbaye), in order to evaluate their impact on birds. The conclusion is that there is very little or no impact. The abundance and diversity of bird species nesting around the two sites is normal for such habitats, no gradiant could be detected in relation to the windmills. Search for birds killed by collisions yielded no victims. Migrating birds showed no signs of disturbance except for the occasional deviation from their flight paths.
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