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The site was identified as internationally important for bird conservation in 2009 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species') at the site:

Species	Red List	Season (year/s of estimate)	Size	IBA criteria
Corncrake Crex crex	LC	breeding (2007–2009)	4 males	C6
Black Kite Milvus migrans	LC	breeding (2003–2009)	10–16 pairs	B2, C6
Middle Spotted Woodpecker Leiopicus medius	LC	resident (2000–2009)	15–20 pairs	B3, C6

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2009. The most recent assessment (2009) is shown below.

State (condition of the trigger species' populations)
Species	Actual vs Reference (units)	% remaining	Result
Grey Partridge Perdix perdix	20 / 30 (pairs)	67	poor
Northern Lapwing Vanellus vanellus	10 / 40 (pairs)	25	very poor
Milvus migrans	16 / 10 (pairs)	100	good

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Human intrusions and disturbance	happe­ning now	some of popul­ation/area (10–49%)	slow decline (1–10% over 3 gener­ations)	medium

Response (conservation actions taken for the trigger species and/or their habitats)
Designation	Planning	Action	Result
Some of area covered (10–49%)	No management plan exists, but the management planning process has begun	Some limited conservation initiatives are in place	low

Year	Protected Area	Designation (management category)	% coverage of IBA
1981	Mondercange-Kazebaach	Humid Zone (-)	1
1988	Lei (Bertrange)	Zones protégées d'intérêt national - Réserve naturelle (Ib)	2
1988	Boufferdanger Muer (Bascharage-Clemency)	Zones protégées d'intérêt national - Réserve naturelle (Ib)	<1
1988	Hautcharage-Boufferdanger Muer	Humid Zone (IV)	<1
1989	Hautcharage-Griechten	Forest Reserve (-)	5
1989	Dahlem-Asselborner Muer	Humid Zone (-)	1
2003	Sanem - Groussebesch / Schouweiler - Bitchenheck	Zones protégées d'intérêt communautaire - Zones Habitats ZSC (IV)	2
2004	Bertrange - Greivelserhaff / Bouferterhaff	Zones protégées d'intérêt communautaire - Zones Habitats ZSC (IV)	12
2004	Hautcharage / Dahlem - Asselborner et Boufferdanger Muer	Zones protégées d'intérêt communautaire - Zones Habitats ZSC (IV)	4
2004	Massif forestier du Aesing	Zones protégées d'intérêt communautaire - Zones Habitats ZSC (IV)	1
2005	Enneschte Bësch (Bertrange)	Zones protégées d'intérêt national - Réserve forestière intégrale (Ib)	2
2015	Région du Lias moyen	Zones protégées d'intérêt communautaire - Zones Oiseaux ZPS (IV)	83
2017	Hautcharage - Griechten	Protected Area (Ib)	4

Habitat	% of IBA	Habitat detail
Grassland	49	Humid grasslands; Mesophile grasslands
Artificial/Terrestrial	26	Arable land; Perennial crops, orchards and groves; Forestry plantations
Forest	25	Alluvial and very wet forest; Broadleaved deciduous woodland; Mixed woodland
Shrubland	minor (<10)
Wetlands (inland)	minor (<10)	Rivers and streams; Standing freshwater

Land use	% of IBA
rangeland/pastureland	49
agriculture	24
forestry	22
tourism/recreation	minor (<10)
nature conservation and research	minor (<10)
hunting	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Region of the Middle Lias (Luxembourg). Downloaded from https://datazone.birdlife.org/site/factsheet/region-of-the-middle-lias-iba-luxembourg on 22/12/2024.