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close| Location | Sweden, Stockholm |
| Central coordinates | 18o 24.10' East 59o 3.93' North |
| IBA criteria | B2, C6 |
| Area | 13,600 ha |
| Altitude | 20 - 70m |
| Year of IBA assessment | 2000 |
Ornithological information This site is important for forest species, including raptors and owls, and some waterbirds. Species of global conservation concern that do not meet IBA criteria: Haliaeetus albicilla (breeding and wintering).
Populations of IBA trigger species
| Species | Season | Period | Population estimate | Quality of estimate | IBA Criteria | IUCN Category |
|---|---|---|---|---|---|---|
| Arctic Loon Gavia arctica | breeding | - | 44-52 breeding pairs | - | B2, C6 | Least Concern |
| Eurasian Eagle-owl Bubo bubo | breeding | - | 1-3 breeding pairs | - | B2, C6 | Least Concern |
| Eurasian Nightjar Caprimulgus europaeus | breeding | - | 40-70 breeding pairs | - | B2, C6 | Least Concern |
Protected areas
| Protected area | Designation | Area (ha) | Relationship with IBA | Overlap with IBA (ha) | |
|---|---|---|---|---|---|
| Blötviken - SE0110362 | Habitats Directive | 5 | protected area contained by site | 5 | |
| Bromseby | Nature Reserve | 18 | protected area contained by site | 14 |
|
| Bromseby - SE0110369 | Habitats Directive | 18 | protected area contained by site | 18 | |
| Domarudden | Nature Reserve | 23 | protected area contained by site | 23 |
|
| Mörtsjöskogen - SE0110254 | Habitats Directive | 29 | protected area contained by site | 29 | |
| Tärnholm - SE0110346 | Habitats Directive | 20 | protected area contained by site | 20 | |
| Trehörningsskogen | Nature Reserve | 179 | protected area contained by site | 172 |
|
| Trehörningsskogen - SE0110133 | Birds Directive | 180 | protected area contained by site | 180 |
Habitats
| IUCN habitat | Habitat detail | Extent (% of site) |
|---|---|---|
| Forest | Mixed woodland; Native coniferous woodland | 70% |
| Wetlands (inland) | Raised bogs; Standing freshwater | 25% |
| Artificial landscapes (terrestrial) | Arable land | 5% |
Land use
| Land-use | Extent (% of site) |
|---|---|
| forestry | 70% |
| agriculture | 5% |
| tourism/recreation | 15% |
| not utilised | 10% |
Management considerations Plans exist for the designation of c.30 smaller protected areas (less than 10 ha each) by the Swedish Forestry Commission, involving the setting up of management agreements with land-owners.
Protection status National Low International None16 ha of IBA covered by Nature Reserve (Bromseby, 16 ha). 216 ha of IBA covered by Nature Reserve (Trehörningen, 216 ha).
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Recommended citation BirdLife International (2013) Important Bird Areas factsheet: Tarnan-Riala forest. Downloaded from http://www.birdlife.org on 22/05/2013
To provide new information to update this factsheet or to correct any errors, please email BirdLife
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