Okski Biosphere Reserve

IBA Criteria

Year of most recent IBA criteria assessment: 2000

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
Corncrake Crex crex LC breeding 1984 100 breeding pairs A1
Greater Spotted Eagle Clanga clanga VU breeding 1987 5-7 breeding pairs A1

Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.

For more information about the IBA assessment process and criteria please click here

IBA Protection

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Urochische Pekhlets Nature Monument 63 protected area overlaps with site 0
Oksky Zapovednik 55,744 protected area overlaps with site 55,722
Okskiy UNESCO-MAB Biosphere Reserve 77,193 protected area overlaps with site 55,731
Oka & Pra River Floodplains Ramsar Site, Wetland of International Importance 161,542 protected area overlaps with site 56,715
Boloto IV (bez nazvaniya) Zakaznik 9 protected area overlaps with site 0

Local conservation groups

The local conservation groups below are working to support conservation at this IBA.

Name Year formed
Caretaker of Okski Zapovednik 2005
For more information on BirdLife's work with Local conservation groups please click here.


IUCN Habitat Habitat detail Extent (% of site)
Forest Mixed woodland, Alluvial and very wet forest -
Shrubland Scrub -
Grassland Humid grasslands -
Wetlands (inland) Fens, transition mires and springs, Rivers and streams -
For further information about the habitat classification please click here.

Land use

Land-use Extent (% of site)
nature conservation and research -
For further information about the land use classification please click here.

Recommended citation
BirdLife International (2023) Important Bird Areas factsheet: Okski Biosphere Reserve. Downloaded from on 23/03/2023.