Data Zone
The site was identified as internationally important for bird conservation in 2010 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 List | Season (year/s of estimate) | Size | IBA criteria |
|---|---|---|---|---|
| Common Goldeneye Bucephala clangula | LC | winter (2004–2009) | 1,500–22,700 birds | C3 |
| Goosander Mergus merganser | LC | winter (2004–2009) | 400–6,500 birds | C3 |
| Horned Grebe Podiceps auritus | VU | passage (2004–2009) | 10–300 birds | C2 |
| Eurasian Curlew Numenius arquata | NT | passage (2007–2009) | 100 birds | C1 |
| Little Gull Hydrocoloeus minutus | LC | passage (2007–2009) | 1,500–5,000 birds | C2 |
| Little Tern Sternula albifrons | LC | breeding (2007–2009) | 40–50 pairs | C6 |
| Common Tern Sterna hirundo | LC | breeding (2007–2009) | 300–360 pairs | C6 |
| Sandwich Tern Thalasseus sandvicensis | LC | passage (2007–2009) | 2,000 birds | C2 |
| Sandwich Tern Thalasseus sandvicensis | LC | breeding (2007–2009) | 300–570 pairs | C2, C6 |
| A4iii Species group - waterbirds | n/a | winter (2004–2009) | 31,700 birds | C4 |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2010. The most recent assessment (2010) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2010 | very poor | very high | low |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | population | medium | |
| State (condition of the trigger species' populations) | |||||
|---|---|---|---|---|---|
| Species | Actual vs Reference (units) | % remaining | Result | ||
| Little Tern Sternula albifrons | 15 / 45 (pairs) | 34 | very poor | ||
| Common Tern Sterna hirundo | 50 / 160 (pairs) | 32 | very poor | ||
| Sandwich Tern Thalasseus sandvicensis | 100 / 190 (pairs) | 53 | poor | ||
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Biological resource use | happening now | whole of population/area (>90%) | rapid decline (>30% over 3 generations) | very high |
| Human intrusions and disturbance | happening now | whole of population/area (>90%) | rapid decline (>30% over 3 generations) | very high |
| Climate change and severe weather | happening now | whole of population/area (>90%) | rapid decline (>30% over 3 generations) | very high |
| Pollution | happening now | whole of population/area (>90%) | slow decline (1–10% over 3 generations) | high |
| Invasive and other problematic species and genes | happening now | most of population/area (50–90%) | moderate decline (10–30% over 3 generations) | high |
| Agricultural expansion and intensification | happening now | most of population/area (50–90%) | slow decline (1–10% over 3 generations) | high |
| Residential and commercial development | likely in long term (>4 years) | some of population/area (10–49%) | slow decline (1–10% over 3 generations) | medium |
| No known threats | happening now | few individuals/small area (<10%) | no or slight decline (<1% over 3 generations) | low |
| Response (conservation actions taken for the trigger species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | Action | Result |
| Some of area covered (10–49%) | No management plan exists, but the management planning process has begun | Substantive conservation measures are being implemented, but these are not comprehensive and are limited by resources and capacity | low |
| Year | Protected Area | Designation (management category) | % coverage of IBA |
|---|---|---|---|
| - | Vistula river mouth | Baltic Sea Protected Area (Helcom) (UA) | 100 |
| 1991 | Mewia Łacha | Rezerwat Przyrody (IV) | 23 |
| 1991 | Mewia Lacha (acha) | Nature Reserve (-) | - |
| 2015 | Vistula River Mouth | Ramsar Site, Wetland of International Importance (IV) | 98 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Grassland | 25 | Steppes and dry calcareous grassland; Humid grasslands |
| Forest | 10 | Broadleaved deciduous woodland; Native coniferous woodland; Mixed woodland; Alluvial and very wet forest |
| Shrubland | 5 | Scrub |
| Marine Coastal/Supratidal | major (>10) | |
| Marine Intertidal | major (>10) |
| Land use | % of IBA |
|---|---|
| fisheries/aquaculture | 50 |
| nature conservation and research | 35 |
| forestry | 5 |
| tourism/recreation | 5 |
| agriculture | 5 |
| hunting | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Vistula river mouth (Poland). Downloaded from
https://datazone.birdlife.org/site/factsheet/vistula-river-mouth-iba-poland on 23/12/2024.