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Location Poland, kujawsko-pomorskie
Central coordinates 19o 34.00' East  53o 17.00' North
IBA criteria C4, C7
Area 3,136 ha
Altitude 71 - 132m
Year of IBA assessment 2010

Ogólnopolskie Towarzystwo Ochrony Ptaków

Site description The site lies in the Drwêca river valley between Brodnica town and the road between Jajkowo and G³êboczek villages, and includes the lower parts of the Brynica and Samionka river valleys, Sopieñ lake and Ostrów lake. The valley is 600 m to 3 km in width and includes a canal system and oxbow lakes. The Drwêca river has a natural character and meanders strongly; overflow in early spring causes extensive flooding. The vegetation is species-rich; besides meadows there are reedbeds Phragmites, sedge-beds and small stands of alder Alnus woodland.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Bean Goose Anser fabalis passage  2004-2009  3,300 individuals  good  C7  Least Concern 
Greater White-fronted Goose Anser albifrons passage  2004-2009  7,000 individuals  good  C7  Least Concern 
A4iii Species group - waterbirds passage  2004-2009  5,000-20,000 individuals  poor  C4   

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Bagienna Dolina Drwecy - PLB040002 Birds Directive 3,366 protected area contains site 3,136  
Dolina Drwecy - PLH280001 Habitats Directive 12,562 protected area overlaps with site 816  
Drweca Nature Reserve 444 protected area contained by site 1,287  
OChK Doliny Drw_cy w woj. Warmi_sko - mazurskim Protected Landscape Area 721 unknown 0  
OChK Doliny Drwecy w woj. Kujawsko - pomorskim Protected Landscape Area 56,848 protected area contains site 3,136  


IUCN habitat Habitat detail Extent (% of site)
Forest Alluvial and very wet forest; Broadleaved deciduous woodland; Mixed woodland; Native coniferous woodland  44%
Grassland Humid grasslands; Mesophile grasslands; Steppes and dry calcareous grassland  41%
Wetlands (inland) Fens, transition mires and springs; Raised bogs; Rivers and streams; Standing freshwater; Water fringe vegetation  4%
Artificial - terrestrial Arable land; Highly improved re-seeded landscapes; Ruderal land  11%

Land use

Land-use Extent (% of site)
agriculture 30%
forestry 40%
not utilised 30%
hunting -

Protection status National High International None1,287 ha of IBA covered by Nature Reserve (Rzeka Drwêca, 1,287 ha). 3,400 ha of IBA covered by Protected Landscape Area (Dolina Drwêcy, 61,641 ha).

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Marshy valley of the Drweca river. Downloaded from on 20/09/2014

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