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Location Poland, mazowieckie,warminsko-mazurskie
Central coordinates 20o 5.00' East  53o 5.00' North
IBA criteria C1, C6
Area 29,500 ha
Year of IBA assessment 2010

Ogólnopolskie Towarzystwo Ochrony Ptaków

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Montagu's Harrier Circus pygargus breeding  1998-2003  11-15 breeding pairs  C6  Least Concern 
Corncrake Crex crex breeding  1995-2003  60-150 males only  C1  Least Concern 


IUCN habitat Habitat detail Extent (% of site)
Forest   5%
Grassland   75%
Artificial - terrestrial   15%
Wetlands (inland)   3%
Other   2%

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Wkra and Mlawka Rivers Valleys. Downloaded from on 24/10/2016

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