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Location Poland, kujawsko-pomorskie
Central coordinates 17o 42.00' East  53o 8.00' North
IBA criteria A4i, B1i
Area 3,200 ha
Altitude 60 - 80m
Year of IBA assessment 2000

Ogólnopolskie Towarzystwo Ochrony Ptaków

Site description Two fish-pond complexes in the Toruñ-Eberswald stream valley. Œlesin fish-pond complex (170 ha) lies c.20 km west of the town of Bydgoszcz, and comprises 14 small ponds of a few hectares each and one large pond (130 ha). Wystêp fish-pond complex (200 ha) is similar. The ponds are full from April to October, supplied by the Bydgoszcz channel and drainage ditches, and are used for fish-farming (carp Cyprinus). Both complexes are surrounded by wet meadows, used for pasture and hay, and areas of mire and wet forest.

Key Biodiversity The most important place in Poland for Cygnus columbianus during migration, and a moulting site for Cygnus olor. In summer up to 600 Remiz pendulinus and several dozen Panurus biarmicus are present. Species of global conservation concern that do not meet IBA criteria: Haliaeetus albicilla (one pair resident; up to five birds on passage), Crex crex (new breeder).

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Tundra Swan Cygnus columbianus passage  1995  178-429 individuals  A4i, B1i  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Laki Slesinskie Nature Reserve 42 protected area contained by site 42  


IUCN habitat Habitat detail Extent (% of site)
Forest Alluvial and very wet forest; Broadleaved deciduous woodland; Native coniferous woodland  10%
Shrubland Scrub  5%
Grassland Humid grasslands; Mesophile grasslands; Steppes and dry calcareous grassland  65%
Wetlands (inland) Raised bogs; Rivers and streams; Standing freshwater; Water fringe vegetation  18%

Land use

Land-use Extent (% of site)
agriculture 70%
fisheries/aquaculture 20%
forestry 10%
hunting -

Protection status National Low International None42 ha of IBA covered by Nature Reserve (£¹ki Œlesiñskie, 42 ha).

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Slesin and Wystep ponds. Downloaded from on 24/10/2016

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