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Location Poland, kujawsko-pomorskie,pomorskie
Central coordinates 18o 25.00' East  53o 23.00' North
IBA criteria C1, C2, C4, C6
Area 36,380 ha
Altitude 1 - 50m
Year of IBA assessment 2010

Ogólnopolskie Towarzystwo Ochrony Ptaków

Site description The site comprises a 260-km stretch of the Wis³a (Vistula) river flood-plain (of which about 190 km is embanked against floods), between W³oc³awek town in the south and Przegalina sluice (6 km from the Wis³a river mouth) in the north. The terrain is highly varied. Riverbanks or slopes are dozens of metres high in some places, very flat and low-lying in others. The riverbed itself constitutes about quarter of the site's area; the rest consists of meadows, scrub (mainly willow Salix), small patches of riverine forest, and numerous oxbow lakes and wetlands. The river passes through some quite large towns (e.g. Toruñ, Bydgoszcz, Grudzi¹dz, Tczew).

Key Biodiversity A total of 126 bird species have been recorded breeding or probably breeding at the site, including the largest number of Crex crex (153 calling males in 1998) at any site in the Wis³a valley. The area also supports significant parts of the national breeding populations of Charadrius hiaticula, Charadrius dubius, Sterna hirundo and Sterna albifrons. In 1994 a total of c.37,000 waterbirds were estimated to occur along the river in the late summer post-breeding period, and 46,500 in winter (mainly ducks).

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
White-tailed Sea-eagle Haliaeetus albicilla breeding  2007-2008  15-19 breeding pairs  good  C6  Least Concern 
Corncrake Crex crex breeding  2006-2009  98-120 males only  good  C1  Least Concern 
Eurasian Golden Plover Pluvialis apricaria passage  2005-2008  6,000-8,000 individuals  good  C2  Least Concern 
Eurasian Curlew Numenius arquata passage  2005-2008  750-1,100 individuals  good  C1  Near Threatened 
Common Tern Sterna hirundo breeding  2004-2008  255-353 breeding pairs  good  C6  Least Concern 
Little Tern Sternula albifrons breeding  2004-2008  102-119 breeding pairs  good  C6  Least Concern 
Black Tern Chlidonias niger breeding  1998  60 breeding pairs  C6  Least Concern 
Barred Warbler Sylvia nisoria breeding  1998-2000  360 breeding pairs  medium  C6  Least Concern 
A4iii Species group - waterbirds passage  2004-2009  20,000 individuals  poor  C4   

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Linie NR (Peatbog Reserve) Nature Reserve 13 unknown 12  
Wielka Ke/pa [Forest Reserve] Nature Reserve 28 protected area contained by site 28  
Zespó Nadwiolañskich Parków Krajobrazowych Landscape Park 25,965 unknown 33,306  
Zespo/l/ Nadwis/lan/skich Parko/w Krajobrazowych Landscape Park 35,400 protected area overlaps with site 10,000  


IUCN habitat Habitat detail Extent (% of site)
Forest Alluvial and very wet forest  8%
Grassland Humid grasslands; Mesophile grasslands  21%
Wetlands (inland) Fens, transition mires and springs; Rivers and streams; Standing freshwater; Water fringe vegetation  31%
Artificial - terrestrial Other urban and industrial areas  38%
Other   2%

Land use

Land-use Extent (% of site)
agriculture 20%
fisheries/aquaculture 25%
tourism/recreation 5%
urban/industrial/transport 20%
not utilised 15%
unknown 15%
hunting -

Protection status National Partial International NoneAbout 10,000 ha covered by Landscape Park (Zespó³ Nadwiœlañskich, 35,400 ha).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Lower Vistula River Valley. Downloaded from on 25/10/2016

To provide new information to update this factsheet or to correct any errors, please email BirdLife