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

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
Great Black-backed Gull Larus marinus	LC	breeding	1997	51-100 breeding pairs	B3
Caspian Tern Hydroprogne caspia	LC	breeding	1997	101-200 breeding pairs	A4i, B1i, B2, C2, C6
Black Guillemot Cepphus grylle	LC	breeding	1997	1,001-2,000 breeding pairs	B1ii, B2
Razorbill Alca torda	LC	breeding	1997	1,001-2,000 breeding pairs	B1ii, B3, C3

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 (2010) is shown below.

State (condition of the trigger species' populations)
Species	Reference	Actual	Units	% remaining	Result
Great Black-backed Gull Larus marinus	50	60	breeding pairs	100	favourable
Caspian Tern Hydroprogne caspia	100	85	breeding pairs	85	near favourable
Black Guillemot Cepphus grylle	1,000	1,100	breeding pairs	100	favourable
Razorbill Alca torda	1,700	1,700	breeding pairs	100	favourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Human intrusions and disturbance	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
Unknown	No management planning has taken place	Very little or no conservation action taking place	negligible

Year	Protected Area	Designation	% overlap with IBA
1974	Signilskär-Märket Archipelago	Ramsar Site, Wetland of International Importance	100
1997	Signilskär - Märket	Special Protection Area (Birds Directive)	47
1997	Signilskär - Märket	Site of Community Importance (Habitats Directive)	47
1997	Läggningsbådan	Special Protection Area (Birds Directive)	1
1997	Märrkallarna - Åbergsgrynnan - Mjölskärskallen	Site of Community Importance (Habitats Directive)	<1
2015	Signilskär - Märket	Baltic Sea Protected Area (HELCOM)	47

Habitat1	Habitat detail	% of IBA
Marine Neritic		60
Marine Coastal/Supratidal		40

1. IUCN Habitat classification.

Land use	% of IBA
not utilised	60
tourism/recreation	30
unknown	10

---

Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Eckerö and Hammarland archipelago (Finland). Downloaded from https://datazone.birdlife.org/site/factsheet/eckerö-and-hammarland-archipelago-iba-finland on 23/11/2024.