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Location Poland, mazowieckie,warminsko-mazurskie
Central coordinates 21o 20.00' East  53o 12.00' North
IBA criteria C1, C6
Area 34,390 ha
Altitude 100 - 125m
Year of IBA assessment 2010

Ogólnopolskie Towarzystwo Ochrony Ptaków

Site description Large areas of fen are located in the middle stretch of this river valley and in flooded parts of the upper river valley. In the lower stretches there is natural old-growth riverine forest, and sandy grasslands.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Corncrake Crex crex breeding  2008  196-215 males only  good  C1  Least Concern 
Black-tailed Godwit Limosa limosa breeding  2008  26 breeding pairs  good  C1  Near Threatened 
Eurasian Curlew Numenius arquata breeding  2008  46-56 breeding pairs  good  C1  Near Threatened 
European Nightjar Caprimulgus europaeus breeding  2008  100 breeding pairs  poor  C6  Least Concern 
European Roller Coracias garrulus breeding  2008  5-6 breeding pairs  good  C6  Least Concern 


IUCN habitat Habitat detail Extent (% of site)
Forest Alluvial and very wet forest  24%
Grassland Mesophile grasslands; Steppes and dry calcareous grassland  43%
Wetlands (inland) Fens, transition mires and springs; Rivers and streams; Water fringe vegetation  1%
Artificial - terrestrial Highly improved re-seeded landscapes; Ruderal land  31%
Other   1%

Land use

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

Protection status National None International None

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Omulew and Plodownica Rivers Valleys. Downloaded from on 26/10/2016

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