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The site was identified as important in 2000 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species'):

Species	Current IUCN Red List Category	Season	Year(s)	Population estimate at site	IBA criteria met
Velvet Scoter Melanitta fusca	VU	winter	1997	1,500 individuals	B2
Greater Scaup Aythya marila	LC	winter	1997	1-160 individuals	B2
Northern Pintail Anas acuta	LC	winter	1997	277-1,631 individuals	B1i, C3
Corncrake Crex crex	LC	breeding	1996	26-31 breeding pairs	A1, C1, C6
Spotted Crake Porzana porzana	LC	breeding	1991	1-10 breeding pairs	C6
Eurasian Spoonbill Platalea leucorodia	LC	passage	1991	140 individuals	A4i, B1i, C2
Pied Avocet Recurvirostra avosetta	LC	winter	1997	437-1,360 individuals	A4i, B1i, B2, C2
Pied Avocet Recurvirostra avosetta	LC	breeding	1997	10 breeding pairs	C6
Pied Avocet Recurvirostra avosetta	LC	passage	1997	5,000 individuals	A4i, B1i, C2
Black-winged Stilt Himantopus himantopus	LC	breeding	1995	4-7 breeding pairs	C6
Bar-tailed Godwit Limosa lapponica	NT	passage	1997	500-1,000 individuals	A4i, B1i, C2
Common Redshank Tringa totanus	LC	passage	1997	1,000-10,000 individuals	A4i, B1i, C3
Common Tern Sterna hirundo	LC	passage	1991	1,500-2,000 individuals	B1i, C2
Sandwich Tern Thalasseus sandvicensis	LC	passage	1991	1,500-2,000 individuals	B1i, C2
Western Marsh-harrier Circus aeruginosus	LC	breeding	1997	3-5 breeding pairs	C6
Bluethroat Luscinia svecica	LC	breeding	1991	1-10 breeding pairs	C6
A4iii Species group - waterbirds	n/a	winter	1997	min 20,000 individuals	A4iii, C4

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2000).

State (condition of the trigger species' habitats)
Habitat	Habitat detail	Reference area (ha)	Actual area (ha)	Habitat quantity (% remaining)	Habitat quality (carrying capacity)	Result
Marine Coastal/Supratidal		0	0	moderate (70-90%)	poor (40-69%)	very unfavourable

Pressure (threats to the trigger species and/or their habitats)
Threat level 1	Threat level 2	Timing	Scope	Severity	Result
Agricultural expansion and intensification	annual & perennial non-timber crops - agro-industry farming	happening now	small area/few individuals (<10%)	moderate to rapid deterioration	low
Biological resource use	hunting & collecting terrestrial animals - intentional use (species being assessed is the target)	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Pollution	industrial & military effluents - type unknown/unrecorded	happening now	small area/few individuals (<10%)	no or imperceptible deterioration	low
Residential and commercial development	commercial and industrial development	likely in short term (within 4 years)	some of area/population (10-49%)	moderate to rapid deterioration	medium

Response (conservation actions taken for the trigger species and/or their habitats)
Protected-area designation	Management planning	Other conservation action	Result
Most of site (50-90%) covered (including the most critical parts for important bird species)	A management plan exists but it is out of date or not comprehensive	Very little or no conservation action taking place	low

For more information about IBA conservation status, please click here

Protected area (PA)	PA designation	PA area (ha)	Relationship of PA with IBA	Overlap of PA with IBA (ha)
RIVES DE SEINE SUD - 27	Terrain acquis par le Conservatoire du Littoral	441	protected area contained by site	0
RIVES DE SEINE SUD - 14	Terrain acquis par le Conservatoire du Littoral	280	protected area contained by site	0
RISLE MARITIME	Terrain acquis par le Conservatoire du Littoral	592	protected area overlaps with site	0
Marais Vernier; Risle Maritime	Site of Community Importance (Habitats Directive)	7,652	protected area overlaps with site	5,112
Marais Vernier et Vallée de la Risle maritime	Ramsar Site, Wetland of International Importance	9,564	protected area overlaps with site	0
Marais Vernier	Réserve naturelle nationale	148	protected area contained by site	0
MARAIS VERNIER	Terrain acquis par le Conservatoire du Littoral	601	protected area overlaps with site	0
Marais des litières de Quillebeuf	Arrêté de protection de biotope	15	protected area contained by site	0
Mannevilles	National Nature Reserve	93	protected area contained by site	93
Falaises de Saint-Nicolas de la Taille	Arrêté de protection de biotope	14	protected area overlaps with site	0
Estuaire et marais de la Basse Seine	Special Protection Area (Birds Directive)	18,840	protected area overlaps with site	12,937
Estuaire de la Seine	Nature Reserve	3,770	protected area overlaps with site	1,000
ESTUAIRE DE LA SEINE	Terrain acquis par le Conservatoire du Littoral	625	protected area overlaps with site	0
Estuaire de la Seine	Site of Community Importance (Habitats Directive)	11,341	protected area overlaps with site	9,165
Estuaire de la Seine	Marine Protected Area (OSPAR)	10,900	protected area overlaps with site	0
Estuaire de la Seine	Réserve naturelle nationale	8,528	protected area overlaps with site	6,528
Estuaire de la Seine	Marine Protected Area (OSPAR)	8,400	protected area overlaps with site	0
Boucles de la Seine normande	Parc naturel régional	89,614	protected area overlaps with site	0
Banc herbeux	Hunting Reserve	1,200	protected area contained by site	1,200
Baie de Seine	Hunting Reserve	7,800	protected area contained by site	7,800

Habitat (IUCN level 1)	Habitat detail	Extent (% of site)
Grassland	Humid grasslands	-
Artificial/Terrestrial	Other urban and industrial areas, Ruderal land	-
Marine Neritic		-
Marine Intertidal		-
Marine Coastal/Supratidal		-

For more information about the IUCN Habitat classification, please click here.

Land-use	Extent (% of site)
agriculture	-
fisheries/aquaculture	-
hunting	-
tourism/recreation	-
urban/industrial/transport	-

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Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Estuaire et embouchure de la Seine. Downloaded from http://datazone.birdlife.org/site/factsheet/estuaire-et-embouchure-de-la-seine-iba-france on 03/12/2023.