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Location Luxembourg, Canton de Mersch
Central coordinates 6o 13.00' East  49o 45.00' North
IBA criteria C7
Area 219 ha
Altitude 290 - 360m
Year of IBA assessment 2009

Letzebuerger natur-A Vulleschutz-Liga

Site description A farm and grassland area, adjacent to the Weisse Ernz stream.

Key Biodiversity The third most important site for Crex crex in Luxembourg. Breeding birds include Alcedo atthis and Lanius collurio. Milvus milvus breeds in the nearby forests. The wet grasslands also provide important roosting habitat for Philomachus pugnax and Pluvialis apricaria.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Corncrake Crex crex breeding  1995-1998  1 breeding pairs  C7  Least Concern 

IBA Monitoring

2009 high unfavourable medium

Agriculture and aquaculture annual & perennial non-timber crops - agro-industry farming happening now majority/most of area/population (50-90%) moderate to rapid deterioration high
Agriculture and aquaculture livestock farming and ranching (includes forest grazing) - agro-industry grazing, ranching or farmin happening now some of area/population (10-49%) moderate to rapid deterioration high

Forest Alluvial and very wet forest  0 0 good (> 90%) good (> 90%) favourable
Grassland Humid grasslands  0 0 moderate (70-90%) moderate (70-90%) unfavourable
Grassland Humid grasslands  0 0 moderate (70-90%) moderate (70-90%) unfavourable
Wetlands (inland) Water fringe vegetation  0 0 good (> 90%) good (> 90%) favourable

Most of site (50-90%) covered (including the most critical parts for important bird species)  A comprehensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species  Some limited conservation initiatives are in place  medium 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Koedange-Reimeschbierg Divers Nature Reserve 520 protected area overlaps with site 130  


IUCN habitat Habitat detail Extent (% of site)
Shrubland Scrub  3%
Grassland Humid grasslands; Mesophile grasslands  71%
Wetlands (inland) Rivers and streams; Water fringe vegetation  6%
Forest Alluvial and very wet forest; Broadleaved deciduous woodland; Mixed woodland  5%
Artificial - terrestrial Arable land; Forestry plantations; Other urban and industrial areas; Ruderal land  15%

Land use

Land-use Extent (% of site)
agriculture 6%
rangeland/pastureland 66%
hunting minor
nature conservation and research minor
tourism/recreation minor

Protection status National None International None

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Valley of the Ernze Blanche. Downloaded from on 26/10/2016

To provide new information to update this factsheet or to correct any errors, please email BirdLife