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close| Location | Finland, Etelä-Suomen lääni |
| Central coordinates | 23o 34.00' East 59o 46.00' North |
| IBA criteria | A1, A4i, B1i, B2, B3, C1, C2, C6 |
| Area | 32,666 ha |
| Altitude | |
| Year of IBA assessment | 2000 |
Ornithological information An important area for island-breeding birds with the largest populations of Sterna caspia and Larus marinus in Finland.
Site description A large archipelago on the eastern side of the Hanko peninsula. Hundreds of islands dominate the landscape, several of which are very large and forested, though most are small and rocky with very sparse vegetation.
Populations of IBA trigger species
| Species | Season | Period | Population estimate | Quality of estimate | IBA Criteria | IUCN Category |
|---|---|---|---|---|---|---|
| White-tailed Eagle Haliaeetus albicilla | winter | 1994 | 20-30 individuals | medium | A1, C1 | Least Concern |
| Mew Gull Larus canus | breeding | 1994 | 800-1,000 breeding pairs | medium | B2 | Least Concern |
| Great Black-backed Gull Larus marinus | breeding | 1994 | 130-160 breeding pairs | medium | B3 | Least Concern |
| Caspian Tern Sterna caspia | breeding | 1994 | 115 breeding pairs | good | A4i, B1i, B2, C2, C6 | Least Concern |
| Black Guillemot Cepphus grylle | breeding | 1994 | 120 breeding pairs | good | B2 | Least Concern |
Protected areas
| Protected area | Designation | Area (ha) | Relationship with IBA | Overlap with IBA (ha) | |
|---|---|---|---|---|---|
| Ahlglon luonnonsuojelualue | Private Nature Reserve | 780 | unknown | 0 |
|
| Busön luonnonsuojelualue | Private Nature Reserve | 13 | unknown | 0 |
|
| Gästansin Luonnnonsuojelualue | Private Nature Reserve | 123 | unknown | 0 |
|
| Hättön luonnonsuojelualue | Private Nature Reserve | 443 | unknown | 0 |
|
| Hummelskärin luonnonsuojelualue | Private Nature Reserve | 15 | unknown | 0 |
|
| Lill-Skälön luonnonsuojelualue | Private Nature Reserve | 120 | unknown | 0 |
|
| Nothamnin luonnonsuojelualue | Private Nature Reserve | 3,528 | unknown | 0 |
|
| Strömsön luonnonsuojelualue | Private Nature Reserve | 334 | unknown | 0 |
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| Tammisaaren ja Hangon saariston ja Pohjanpitäjänlahden merensuojelualue - FI0100005 | Birds Directive | 52,630 | protected area overlaps with site | 23,608 | |
| Tammisaaren Saariston kansallispuisto | National Park | 5,487 | protected area contained by site | 6,173 |
|
Habitats
| IUCN habitat | Habitat detail | Extent (% of site) |
|---|---|---|
| Sea | 80% | |
| Coastline | 5% |
Land use
| Land-use | Extent (% of site) |
|---|---|
| hunting | - |
| military | - |
| tourism/recreation | - |
Management considerations Human impact is high in some parts, minor in others. Part of the area is a candidate SAC.
Protection status National Partial International Partial6,173 ha of IBA covered by National Park (Tammisaaren Saaristo, 6,173 ha). 5,360 ha of IBA covered by Protected Area on Private Lands (Hättö, 442 ha; Hummelskär, 14 ha; Strömsö, 334 ha; Gästans, 124 ha; Lill-Skälö, 119 ha; Busö, 134 ha; Nothamn, 3,544 ha; Ahlglo, 786 ha). 25,132 ha of IBA covered by two Special Protection Areas (Tammisaaren ja Hangon saaristo; Inkoon saaristo).
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Recommended citation BirdLife International (2013) Important Bird Areas factsheet: Tammisaari and Inkoo western archipelago. Downloaded from http://www.birdlife.org on 24/05/2013
To provide new information to update this factsheet or to correct any errors, please email BirdLife
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