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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
Common Eider Somateria mollissima	NT	breeding	1996	36,500-36,700 breeding pairs	A4i, B1i, C3
Common Eider Somateria mollissima	NT	non-breeding	1996	20,000-40,000 individuals	A4i, B1i, C3
Velvet Scoter Melanitta fusca	VU	breeding	1996	3,850-4,190 breeding pairs	A4i, B1i, C3
Goosander Mergus merganser	LC	breeding	1996	640-660 breeding pairs	A4i, B1i, C3
Red-breasted Merganser Mergus serrator	LC	breeding	1996	590-615 breeding pairs	B1i, C3
Ruddy Turnstone Arenaria interpres	NT	breeding	1996	790-840 breeding pairs	A4i, B1i, C3
Common Redshank Tringa totanus	LC	breeding	1996	355-370 breeding pairs	B2
Mew Gull Larus canus	LC	breeding	1996	4,500-5,000 breeding pairs	B2
Lesser Black-backed Gull Larus fuscus	LC	breeding	1996	950-1,300 breeding pairs	B1i, B3, C3
Great Black-backed Gull Larus marinus	LC	breeding	1996	460-480 breeding pairs	B3
Caspian Tern Hydroprogne caspia	LC	breeding	1996	100-250 breeding pairs	A4i, B1i, B2, C2, C6
Arctic Tern Sterna paradisaea	LC	breeding	1996	2,490 breeding pairs	C2
Arctic Jaeger Stercorarius parasiticus	LC	breeding	1996	175-200 breeding pairs	B1ii, C3
Black Guillemot Cepphus grylle	LC	breeding	1996	4,000-4,400 breeding pairs	A4ii, B1ii, B2
Razorbill Alca torda	LC	breeding	1996	1,400-2,000 breeding pairs	B1ii, B3, C3
Common Murre Uria aalge	LC	breeding	1996	200-400 breeding pairs	B1ii, C3
A4iii Species group - waterbirds	n/a	breeding	1996	20,000-49,999 breeding pairs	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
-	Outer Stockholm archipelago	Baltic Sea Protected Area (Helcom)	18
-	Outer Stockholm archipelago	Bird Sanctuary	-
-	Outer Stockholm archipelago	Baltic Sea Protected Area (Helcom)	9
1900	Biskopsö	Naturreservat	3
1900	Svenska Björn	Naturreservat	2
1900	Långviksskär	Naturreservat	1
1900	Svenska Högarna	Naturreservat	2
1900	Storö-Bockö-Lökaö	Naturreservat	2
1900	Huvudskär	Naturreservat	1
1900	Långskär	Naturreservat	1
1900	Utö	Naturreservat	<1
1900	Lygne	Djur- och växtskyddsområde	<1
1900	Svenska stenarna	Djur- och växtskyddsområde	<1
1900	Rörskären	Djur- och växtskyddsområde	<1
1900	Gjusharan	Djur- och växtskyddsområde	<1
1900	Viksharorna	Djur- och växtskyddsområde	<1
1900	Torrmulen	Djur- och växtskyddsområde	<1
1900	Rödlöga 1:6	Naturminne	-
1900	Vidingsöra	Naturreservat	<1
1900	Grönskär	Naturreservat	<1
1900	Norrpada	Naturreservat	<1
1982	Grän	Wildlife and Plant Sanctuary	<1
1983	Stora Nassa	Wildlife and Plant Sanctuary	<1
1983	Ängsö/Marskär	Wildlife and Plant Sanctuary	<1
1989	Stockholm, outer archipelago	Ramsar Site, Wetland of International Importance	9
1995	Bullerö-Bytta	Site of Community Importance (Habitats Directive)	9
1995	Fjärdlång	Site of Community Importance (Habitats Directive)	2
1995	Stora Nassa	Site of Community Importance (Habitats Directive)	2
1995	Svenska Högarna	Site of Community Importance (Habitats Directive)	2
1995	Utö	Site of Community Importance (Habitats Directive)	<1
1995	Villinge Boskapsö	Site of Community Importance (Habitats Directive)	<1
1996	Svenska Högarna	Special Protection Area (Birds Directive)	2
1997	Svenska Björn	Site of Community Importance (Habitats Directive)	3
1997	Huvudskär	Site of Community Importance (Habitats Directive)	1
1998	Norrpada	Site of Community Importance (Habitats Directive)	<1
2001	Stora Nassa	Special Protection Area (Birds Directive)	2
2008	Stora Nassa-Sv. Högarna	Baltic Sea Protected Area (HELCOM)	18
2008	Bullerö-Bytta	Baltic Sea Protected Area (HELCOM)	9
2008	Bullerö	Naturreservat	3
2008	Fjärdlång	Naturreservat	1
2008	Nåttarö	Naturreservat	<1
2012	Villinge Boskapsö	Naturreservat	<1
2013	Stora Nassa	Naturreservat	2
2015	Ålandsskär	Naturreservat	<1
2016	Sundby	Naturreservat	<1

Habitat1	Habitat detail	% of IBA
Marine Neritic		90
Forest	Broadleaved deciduous woodland	5
Grassland	Dry siliceous grassland	5
Marine Coastal/Supratidal		-

1. IUCN Habitat classification.

Land use	% of IBA
hunting	50
tourism/recreation	50
nature conservation and research	10
military	5

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Archipelago of Stockholm (Sweden). Downloaded from https://datazone.birdlife.org/site/factsheet/archipelago-of-stockholm-iba-sweden on 22/11/2024.