IBA Criteria

Year of most recent IBA criteria assessment: 2004

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
Tundra Swan Cygnus columbianus LC winter 2003 present A4i
Bean Goose Anser fabalis LC winter 2003 present A4i
Greater White-fronted Goose Anser albifrons LC winter 2003 present A4i
Schrenck's Bittern Ixobrychus eurhythmus LC breeding 2003 present A3
Japanese Night-heron Gorsachius goisagi VU breeding 2003 present A1, A3
Long-billed Plover Charadrius placidus LC breeding 2003 present A3
Grey-faced Buzzard Butastur indicus LC breeding 2003 present A3
Marsh Grassbird Helopsaltes pryeri NT breeding 2003 present A1, A3
A4iii Species group - waterbirds n/a winter 2003 min 20,000 individuals A4iii

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)
2010 low not assessed negligible
Was the whole site covered? Yes State assessed by unset
Accuracy of information poor

Threats to the site (pressure)
Threat Level 1 Threat Level 2 Timing Scope Severity Result
Energy production and mining renewable energy past (and unlikely to return) and no longer limiting majority/most of area/population (50-90%) moderate to rapid deterioration low

Conservation actions taken at site (response)
Conservation Designation Management Planning Conservation Action Result
Little/none of site covered (<10%) Unknown Unknown negligible
For more information about IBA monitoring please click here

IBA Protection

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Ogata sogen 国指定鳥獣保護区 135 protected area overlaps with site 135
Hachirogata seibu 都道府県指定鳥獣保護区 135 protected area overlaps with site 0
Hachirogata 都道府県指定鳥獣保護区 977 protected area contained by site 0


IUCN Habitat Habitat detail Extent (% of site)
Wetlands (inland) Coastal lagoons -
Artificial/Terrestrial Rice paddies, Abandoned farmland, disturbed ground -
For further information about the habitat classification please click here.

Recommended citation
BirdLife International (2022) Important Bird Areas factsheet: Hachirogata. Downloaded from on 05/10/2022.