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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	100 individuals	B2
Common Shelduck Tadorna tadorna	LC	winter	1997	8,000-16,800 individuals	A4i, B1i, C3
Northern Pintail Anas acuta	LC	winter	1997	438-1,229 individuals	B1i, C3
Northern Pintail Anas acuta	LC	passage	1997	500-1,500 individuals	B1i, C3
European Nightjar Caprimulgus europaeus	LC	breeding	1991	25 breeding pairs	C6
Spotted Crake Porzana porzana	LC	breeding	1991	1-5 breeding pairs	C6
Little Crake Zapornia parva	LC	breeding	1991	1-4 breeding pairs	C6
Eurasian Spoonbill Platalea leucorodia	LC	passage	1997	10-100 individuals	B1i, C2
Eurasian Bittern Botaurus stellaris	LC	breeding	1997	3-5 breeding pairs	C6
Little Egret Egretta garzetta	LC	breeding	1997	10-12 breeding pairs	C6
Eurasian Oystercatcher Haematopus ostralegus	NT	winter	1997	5,426-11,400 individuals	A4i, B1i, C3
Pied Avocet Recurvirostra avosetta	LC	breeding	1997	89-94 breeding pairs	B3, C6
Grey Plover Pluvialis squatarola	VU	winter	1997	305-5,053 individuals	A4i, B1i, C3
Grey Plover Pluvialis squatarola	VU	passage	1997	500-6,000 individuals	A4i, B1i, C3
Little Ringed Plover Charadrius dubius	LC	passage	1996	1,000-3,500 individuals	A4i, B1i, C3
Kentish Plover Charadrius alexandrinus	LC	breeding	1997	48-51 breeding pairs	B2
Eurasian Curlew Numenius arquata	NT	winter	1997	551-5,302 individuals	A4i, B1i, B2, C3
Bar-tailed Godwit Limosa lapponica	NT	winter	1997	15-800 individuals	B2
Red Knot Calidris canutus	NT	winter	1997	55-8,070 individuals	B1i, B2, C3
Red Knot Calidris canutus	NT	passage	1997	500-6,000 individuals	B1i, C3
Sanderling Calidris alba	LC	passage	1997	1,000-1,500 individuals	A4i, B1i, C3
Dunlin Calidris alpina	NT	winter	1997	6,300-21,851 individuals	B1i, B2, C3
Short-eared Owl Asio flammeus	LC	breeding	1991	2-3 breeding pairs	C6
Bluethroat Luscinia svecica	LC	breeding	1991	35-40 breeding pairs	C6
A4iii Species group - waterbirds	n/a	passage	1997	20,000-49,999 individuals	A4iii, C4
A4iii Species group - waterbirds	n/a	winter	1997	20,000-49,999 individuals	A4iii, C4

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

Year	Protected Area	Designation	% overlap with IBA
-	Baie de Somme Terrestre	Hunting Reserve	<1
-	Baie de Somme Maritime	Hunting Reserve	1
-	Parc Ornithologique du Marque terre	Private Reserve	<1
-	Authie-Somme	Hunting Reserve	8
1979	LE MARQUENTERRE	Terrain acquis par le Conservatoire du Littoral	<1
1980	LE BOIS HOUDANT	Terrain acquis par le Conservatoire du Littoral	<1
1981	BAIE D'AUTHIE RIVE SUD	Terrain acquis par le Conservatoire du Littoral	<1
1982	DUNES DE L'AUTHIE	Terrain acquis par le Conservatoire du Littoral	<1
1986	Baie D'Authie Rive Nord	Terrain acquis par le Conservatoire du Littoral	<1
1986	Hable D'ault	Terrain acquis par le Conservatoire du Littoral	<1
1991	BAIE ET BASSE VALLEE DE LA SOMME	Terrain acquis par le Conservatoire du Littoral	<1
1994	Baie de Somme	Réserve naturelle nationale	2
1995	Littoral Cauchois	Site of Community Importance (Habitats Directive)	<1
1995	L'Yères	Site of Community Importance (Habitats Directive)	<1
1996	Estuaires et littoral picards (baies de Somme et d'Authie)	Site of Community Importance (Habitats Directive)	8
1996	Dunes de l'Authie et Mollières de Berck	Site of Community Importance (Habitats Directive)	<1
1996	Dunes et marais arrière-littoraux de la plaine maritime picarde	Site of Community Importance (Habitats Directive)	<1
1998	Baie de Somme	Ramsar Site, Wetland of International Importance	10
2000	POINTE DU HOURDEL	Terrain acquis par le Conservatoire du Littoral	-
2003	DUNES DE STELLA MERLIMONT	Terrain acquis par le Conservatoire du Littoral	<1
2004	Cordon de galets de La Mollière	Arrêté de protection de biotope	<1
2006	Estuaires picards : Baie de Somme et d'Authie	Special Protection Area (Birds Directive)	9
2006	Baie de Somme	Marine Protected Area (OSPAR)	2
2006	Estuaire de la Canche	Special Protection Area (Birds Directive)	<1
2007	RENCLOTURE DE LA GAITE	Terrain acquis par le Conservatoire du Littoral	-
2008	Baie de Canche et couloir des trois estuaires	Site of Community Importance (Habitats Directive)	1
2012	Estuaires picards et mer d'Opale	Parc naturel marin	82
2012	Littoral Cauchois	Marine Protected Area (OSPAR)	<1
2016	Hâble d'Ault	Arrêté de protection de biotope	<1

Habitat1	Habitat detail	% of IBA
Forest	Native coniferous woodland, Mixed woodland, Alluvial and very wet forest	8
Grassland	Humid grasslands	5
Marine Intertidal		major (>10)
Marine Neritic		major (>10)
Artificial/Terrestrial	Arable land	minor (<10)

1. IUCN Habitat classification.

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

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Estuaires picards : baies de Somme et d'Authie (France). Downloaded from https://datazone.birdlife.org/site/factsheet/estuaires-picards-:-baies-de-somme-et-dauthie-iba-france on 23/11/2024.