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close| Location | Poland, zachodnio-pomorskie |
| Central coordinates | 14o 20.00' East 53o 50.00' North |
| IBA criteria | C1, C2, C3, C4 |
| Area | 8,893 ha |
| Altitude | 0 - 10m |
| Year of IBA assessment | 2010 |
Ornithological information A very attractive area for breeding, migrating and wintering birds with very rich food sources available. Breeding species of global conservation concern that do not meet IBA criteria: Crex crex (two pairs). A total of 140 bird species have been recorded breeding.
Site description A delta (growing in the direction of Szczeciñski lagoon) which contains natural and artificial channels of the Œwina river, with numerous islands. The site also covers the south-west coast of Wolin island and the south-east part of Uznam island adjoining the Piastowski channel. The plant community is very rich. Most of the forest is old-growth (130-150 years), dominated by alder Alnus, mixed birch/oak Betula/Quercus and beech/oak Fagus/Quercus. Open areas are dominated by saltmarsh, rush Scirpus and reedbeds Phragmites. The latter completely cover some islets and almost all shores of the other islands. A very small area is used as arable land.
Populations of IBA trigger species
| Species | Season | Period | Population estimate | Quality of estimate | IBA Criteria | IUCN Category |
|---|---|---|---|---|---|---|
| Smew Mergellus albellus | passage | 2002 | 1,000 individuals | good | C2 | Least Concern |
| Common Merganser Mergus merganser | passage | 2002 | 12,000 individuals | good | C3 | Least Concern |
| Great Cormorant Phalacrocorax carbo | winter | 2004-2009 | 8,000-14,300 individuals | good | C3 | Least Concern |
| Eurasian Curlew Numenius arquata | passage | 2000-2009 | 96 individuals | good | C1 | Near Threatened |
| Aquatic Warbler Acrocephalus paludicola | breeding | 2009 | 11-12 males only | good | C1 | Vulnerable |
| A4iii Species group - waterbirds | winter | 2002-2008 | 35,000 individuals | good | C4 |
Protected areas
| Protected area | Designation | Area (ha) | Relationship with IBA | Overlap with IBA (ha) | |
|---|---|---|---|---|---|
| Delta Swiny - PLB320002 | Birds Directive | 11,008 | protected area overlaps with site | 7,766 | |
| Ujscie Odry i Zalew Szczecinski - PLH320018 | Habitats Directive | 52,612 | protected area overlaps with site | 899 | |
| Wolin i Uznam - PLH320019 | Habitats Directive | 30,792 | protected area overlaps with site | 7,941 | |
| Wolinski PN | National Park | 10,937 | protected area overlaps with site | 2,000 |
|
| Zalew Szczecinski - PLB320009 | Birds Directive | 47,195 | protected area overlaps with site | 899 |
Habitats
| IUCN habitat | Habitat detail | Extent (% of site) |
|---|---|---|
| Forest | Alluvial and very wet forest; Native coniferous woodland | 27% |
| Grassland | Humid grasslands | 15% |
| Wetlands (inland) | Rivers and streams; Standing freshwater; Water fringe vegetation | - |
| Artificial landscapes (terrestrial) | Ruderal land | 6% |
| Other | 2% | |
| Coastline | Salt marshes | - |
Land use
| Land-use | Extent (% of site) |
|---|---|
| agriculture | 30% |
| fisheries/aquaculture | 30% |
| forestry | 5% |
| nature conservation and research | 5% |
| tourism/recreation | 10% |
| not utilised | 10% |
| other | 10% |
Management considerations Threats include the expansion of reedbeds onto saltmarsh following reductions in grazing, and unsuitable forestry practices (clear-cutting). Birds are disturbed by fishermen, tourism and forestry. Eggs of Larus argentatus are sometimes stolen from the colonies (probably by fox farmers), causing disturbance to birds. A part of the IBA (Karsiborska Kêpa, 180 ha) is managed by OTOP (the concept of `private reserve' does not exist in current Polish law). OTOP projects here are: (1) Distribution, numbers and habitat selection of Acrocephalus paludicola (as part of a wider BirdLife International project); (2) action plan for plant community; (3) permanent study of bird numbers and distribution. Projects by the West Pomeranian Ornithological Society include inventory of breeding and migrating birds (June-August 1995).
Protection status National Partial International None2,000 ha of IBA covered by National Park (Woliñski, 10,937 ha).
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Recommended citation BirdLife International (2013) Important Bird Areas factsheet: Delta of the Swina river. Downloaded from http://www.birdlife.org on 20/06/2013
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