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Location Luxembourg, Canton de Wiltz
Central coordinates 5o 51.00' East  49o 52.00' North
IBA criteria C6
Area 3,581 ha
Altitude 325 - 511m
Year of IBA assessment 2009

Letzebuerger natur-A Vulleschutz-Liga

Site description 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).

Key Biodiversity 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 Bonasa bonasia.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Hazel Grouse Bonasa bonasia resident  2000-2009  5-20 breeding pairs  medium  C6  Least Concern 
Black Stork Ciconia nigra breeding  2000-2009  1-2 breeding pairs  medium  C6  Least Concern 
European Honey-buzzard Pernis apivorus breeding  2000-2009  1-5 breeding pairs  medium  C6  Least Concern 
Middle Spotted Woodpecker Leiopicus medius breeding  2000-2009  5-10 breeding pairs  poor  C6  Least Concern 
Osprey Pandion haliaetus passage  2000-2009  10-20 individuals  medium  C6  Least Concern 

IBA Monitoring

2009 high very unfavourable low
Medium - based upon reliable but incomplete / partially representative data

Agriculture and aquaculture annual & perennial non-timber crops - agro-industry farming happening now small area/few individuals (<10%) slow but significant deterioration low
Human intrusions and disturbance recreational activities happening now majority/most of area/population (50-90%) slow but significant deterioration high
Natural system modifications other ecosystem modifications happening now some of area/population (10-49%) slow but significant deterioration medium

Forest Broadleaved deciduous woodland  0 0 poor (40-69%) poor (40-69%) very unfavourable

Bonasa bonasia Hazel Grouse 30 10 breeding pairs 34 very unfavourable
Pandion haliaetus Osprey 15 15 breeding pairs 100 favourable

Whole area of site (>90%) covered by appropriate conservation designation  No management plan exists but the management planning process has begun  Some limited conservation initiatives are in place  low 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Boulaide/Bauschleiden-Paaffels Humid Zone 212 protected area contained by site 212  
Lac de la Haute-Sûre / Insenborn-Buurgknapp Forest Reserve 111 protected area contained by site 111  
Lac de la Haute-Sûre / Mecher-Schlaedchen Forest Reserve 160 protected area overlaps with site 148  
Lac de la Haute-Sûre / Neunhausen-Ningserboesch Forest Reserve 901 protected area overlaps with site 450  
Pont Misère-Barrage de retenue Humid Zone 280 protected area overlaps with site 280  


IUCN habitat Habitat detail Extent (% of site)
Forest Alluvial and very wet forest; Broadleaved deciduous woodland; Native coniferous woodland  51%
Shrubland Scrub  5%
Grassland Mesophile grasslands  9%
Wetlands (inland) Rivers and streams; Standing freshwater  10%
Artificial - terrestrial Arable land; Forestry plantations  25%

Land use

Land-use Extent (% of site)
agriculture 5%
forestry 71%
hunting -
nature conservation and research -
rangeland/pastureland 9%
water management 10%

Protection status National None International HighIBA entirely covered by Special Protection Area.

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Upper Valley of the Sure. Downloaded from on 21/10/2016

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