Supij marsh

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
Eurasian Bittern Botaurus stellaris LC breeding 1996 200-300 breeding pairs B2
Black Tern Chlidonias niger LC breeding 1996 400-500 breeding pairs B2
Aquatic Warbler Acrocephalus paludicola VU breeding 1996 500-1,000 breeding pairs A1, B2

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 Monitoring

Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2016 high not assessed not assessed
Was the whole site covered? Yes State assessed by unset
Accuracy of information good

Threats to the site (pressure)
Threat Level 1 Threat Level 2 Timing Scope Severity Result
Agricultural expansion and intensification annual & perennial non-timber crops - scale unknown/unrecorded happening now whole area/population (>90%) slow but significant deterioration high

Condition of key/trigger populations (state)
Scientific Common TargetPop ActualPop Units Remaining Result
Botaurus stellaris Eurasian Bittern 15 75 breeding pairs 100 favourable
Chlidonias leucopterus White-winged Tern 500 250 breeding pairs 50 unfavourable
Chlidonias niger Black Tern 50 200 breeding pairs 100 favourable
Circus aeruginosus Western Marsh-harrier 60 110 breeding pairs 100 favourable
Circus cyaneus 3 2 breeding pairs 67 unfavourable
Acrocephalus paludicola Aquatic Warbler 85 150 breeding pairs 100 favourable

Conservation actions taken at site (response)
Conservation Designation Management Planning Conservation Action Result
Not assessed Not assessed Not assessed not assessed
For more information about IBA monitoring please click here

IBA Protection

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Usivs'kiy - 2 State Zakaznik 1,448 protected area overlaps with site 0
Svidovets'kiy Regional Zakaznik 893 protected area overlaps with site 0
Supoy Marsh Zakaznik 209 protected area contained by site 209
Boloto Supiy Regional Zakaznik 209 protected area overlaps with site 0


IUCN Habitat Habitat detail Extent (% of site)
Wetlands (inland) Standing freshwater, Rivers and streams, Water fringe vegetation, Fens, transition mires and springs -
For further information about the habitat classification please click here.

Land use

Land-use Extent (% of site)
fisheries/aquaculture -
water management -
not utilised -
For further information about the land use classification please click here.

Recommended citation
BirdLife International (2023) Important Bird Areas factsheet: Supij marsh. Downloaded from on 20/03/2023.