The largest water reservoir in Luxembourg, with adjacent forests. The site was included within a larger IBA (formerly LU001) in the previous international IBA inventory (Grimmett and Jones 1989).
These forests are the most important area in Luxembourg for breeding Ciconia nigra, Pernis apivorus, Milvus milvus, Bonasa bonasia,Dryocopus martius and Dendrocopos medius, all listed on Annex I of the Birds Directive. The coppiced Quercus woodland, with an abundance of undergrowth, particularly favours Bonasabonasia.
National None International HighIBA entirely covered by Special Protection Area.