• Summary
• Text account
• Data table and detailed info
• Map
• Reference and further resources

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

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 poor

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Biological resource use	happe­ning now	some of popul­ation/area (10–49%)	slow decline (1–10% over 3 gener­ations)	medium
Residential and commercial development	likely in short term (<4 years)	some of popul­ation/area (10–49%)	moderate decline (10–30% over 3 gener­ations)	medium
Agricultural expansion and intensification	happe­ning now	few indivi­duals/small area (<10%)	moderate decline (10–30% over 3 gener­ations)	low
Pollution	happe­ning now	few indivi­duals/small area (<10%)	no or slight decline (<1% over 3 gener­ations)	low

Response (conservation actions taken for the trigger species and/or their habitats)
Designation	Planning	Action	Result
Most of area (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 (management category)	% coverage of IBA
-	Baie de Seine	Hunting Reserve (-)	37
-	Banc herbeux	Hunting Reserve (-)	6
1974	Boucles de la Seine normande	Parc naturel régional (V)	49
1993	Marais des litières de Quillebeuf	Arrêté de protection de biotope (IV)	<1
1994	Mannevilles	National Nature Reserve (IV)	<1
1996	ESTUAIRE DE LA SEINE	Terrain acquis par le Conservatoire du Littoral (IV)	3
1997	Estuaire de la Seine	Réserve naturelle nationale (IV)	31
1998	MARAIS VERNIER	Terrain acquis par le Conservatoire du Littoral (IV)	3
1998	RISLE MARITIME	Terrain acquis par le Conservatoire du Littoral (IV)	1
1998	Estuaire de la Seine	Nature Reserve (-)	5
2004	RIVES DE SEINE SUD - 27	Terrain acquis par le Conservatoire du Littoral (IV)	2
2004	RIVES DE SEINE SUD - 14	Terrain acquis par le Conservatoire du Littoral (IV)	1
2007	Estuaire de la Seine	Marine Protected Area (OSPAR) (UA)	48
2008	Falaises de Saint-Nicolas de la Taille	Arrêté de protection de biotope (IV)	<1
2012	Estuaire de la Seine	Marine Protected Area (OSPAR) (UA)	35
2013	Marais Vernier	Réserve naturelle nationale (IV)	1

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

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

---

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 23/12/2024.