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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') at the site:

Species	Red List1	Season	Year(s)	Size	IBA criteria
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

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2000) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2000. The most recent assessment (2013) is shown below.

State (condition of the trigger species' habitats)
Habitat	Quantity (% remaining)	Quality (% carrying capacity)	Result
Marine Coastal/Supratidal	moderate (70-90%)	poor (40-69%)	very unfavourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Biological resource use	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Residential and commercial development	likely in short term (within 4 years)	some of area/population (10-49%)	moderate to rapid deterioration	medium
Agricultural expansion and intensification	happening now	small area/few individuals (<10%)	moderate to rapid deterioration	low
Pollution	happening now	small area/few individuals (<10%)	no or imperceptible deterioration	low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other 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

Year	Protected Area	Designation	% overlap with IBA
-	Banc herbeux	Hunting Reserve	6
-	Baie de Seine	Hunting Reserve	37
1974	Boucles de la Seine normande	Parc naturel régional	49
1993	Marais des litières de Quillebeuf	Arrêté de protection de biotope	<1
1994	Mannevilles	National Nature Reserve	<1
1995	Estuaire de la Seine	Site of Community Importance (Habitats Directive)	43
1995	Marais Vernier; Risle Maritime	Site of Community Importance (Habitats Directive)	24
1996	ESTUAIRE DE LA SEINE	Terrain acquis par le Conservatoire du Littoral	3
1997	Estuaire de la Seine	Réserve naturelle nationale	31
1998	MARAIS VERNIER	Terrain acquis par le Conservatoire du Littoral	3
1998	RISLE MARITIME	Terrain acquis par le Conservatoire du Littoral	1
1998	Estuaire de la Seine	Nature Reserve	5
2004	RIVES DE SEINE SUD - 27	Terrain acquis par le Conservatoire du Littoral	2
2004	RIVES DE SEINE SUD - 14	Terrain acquis par le Conservatoire du Littoral	1
2006	Estuaire et marais de la Basse Seine	Special Protection Area (Birds Directive)	61
2007	Estuaire de la Seine	Marine Protected Area (OSPAR)	48
2008	Falaises de Saint-Nicolas de la Taille	Arrêté de protection de biotope	<1
2012	Estuaire de la Seine	Marine Protected Area (OSPAR)	35
2013	Marais Vernier	Réserve naturelle nationale	1
2015	Marais Vernier et Vallée de la Risle maritime	Ramsar Site, Wetland of International Importance	30

Habitat1	Habitat detail	% of IBA
Artificial/Terrestrial	Other urban and industrial areas, Ruderal land	20
Grassland	Humid grasslands	15
Marine Coastal/Supratidal		major (>10)
Marine Intertidal		major (>10)
Marine Neritic		major (>10)

1. IUCN Habitat classification.

Land use	% of IBA
hunting	40
urban/industrial/transport	15
agriculture	10
fisheries/aquaculture	-
tourism/recreation	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Estuaire et embouchure de la Seine (France). Downloaded from https://datazone.birdlife.org/site/factsheet/estuaire-et-embouchure-de-la-seine-iba-france on 22/11/2024.