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Location Russia (European), Ryazan' region
Central coordinates 40o 42.43' East  54o 48.42' North
IBA criteria A1
Area 56,715 ha
Altitude 88 - 125m
Year of IBA assessment 2000

Site description The south-eastern part of Meschera lowlands covered by wet mixed forests and dry pine forests, and also bogs and small lakes.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Greater Spotted Eagle Clanga clanga breeding  1987  5-7 breeding pairs  good  A1  Vulnerable 
Corncrake Crex crex breeding  1984  100 breeding pairs  A1  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Oka and Pra River Floodplains Wetlands of International Importance (Ramsar) 161,542 protected area contains site 56,715  
Okskiy UNESCO-MAB Biosphere Reserve 77,193 protected area contained by site 55,731  
Oksky Zapovednik 55,722 protected area contained by site 55,722  

Local conservation groups The local conservation group below is working to support conservation at this IBA.

Name Year formed
Caretaker of Okski Zapovednik 2005


IUCN habitat Habitat detail Extent (% of site)
Forest Alluvial and very wet forest; Mixed woodland  80%
Shrubland Scrub  5%
Grassland Humid grasslands  5%
Wetlands (inland) Fens, transition mires and springs; Rivers and streams  10%

Land use

Land-use Extent (% of site)
nature conservation and research 95%

Acknowledgements The identification of IBAs and information collected between 1980 and 2009 provided by the IBA network of the Russian Bird Conservation Union (RBCU).

References E.A.Goryunov

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Okski Biosphere Reserve. Downloaded from on 28/10/2016

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