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Location France, Aquitaine
Central coordinates 1o 20.00' West  43o 36.00' North
IBA criteria A4iii, B1i, B2, C3, C4, C6
Area 4,250 ha
Altitude 5 - 7m
Year of IBA assessment 2000

Ligue Pour La Protection des Oiseaux

Site description A lake, Pinus forests, heathland, marshes, wet meadows and cultivated fields.

Key Biodiversity The site holds 20,000 or more waterbirds in winter, on a regular basis (including Fulica atra 2,562; Vanellus vanellus 3,500). Species of global conservation concern that do not meet IBA criteria: Aythya nyroca (wintering); Haliaeetus albicilla (wintering); Acrocephalus paludicola (passage).

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Northern Pintail Anas acuta winter  1997  414-859 individuals  B1i, C3  Least Concern 
Northern Shoveler Spatula clypeata winter  1997  504-2,054 individuals  B1i, C3  Least Concern 
Common Teal Anas crecca winter  1997  1,770-6,660 individuals  B1i, C3  Least Concern 
Black-crowned Night-heron Nycticorax nycticorax breeding  1991  20 breeding pairs  C6  Least Concern 
Egretta garzetta breeding  1997  20 breeding pairs  C6  Not Recognised 
Himantopus himantopus breeding  1995  3 breeding pairs  C6  Not Recognised 
Eurasian Curlew Numenius arquata winter  1997  38-2,500 individuals  B2  Near Threatened 
Common Kingfisher Alcedo atthis breeding  1991  20-30 breeding pairs  C6  Least Concern 
A4iii Species group - waterbirds winter  1997  20,000 individuals  unknown  A4iii, C4   

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Marais d'Orx National Nature Reserve 775 protected area contained by site 775  


IUCN habitat Habitat detail Extent (% of site)
Forest Native coniferous woodland  25%
Shrubland Heathland  30%
Grassland Humid grasslands  -
Wetlands (inland) Standing freshwater; Water fringe vegetation  26%
Artificial - terrestrial Arable land  13%

Land use

Land-use Extent (% of site)
agriculture 22%
urban/industrial/transport -

Protection status National Partial International Partial775 ha of IBA covered by Nature Reserve (Marais d'Orx, 775 ha). 4,250 ha of IBA covered by Hunting Reserve (4,250 ha). 785 ha of IBA covered by Special Protection Area (Domaine d'Orx, 785 ha).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Domaine d'Orx. Downloaded from on 22/10/2016

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