Data Zone
The site was identified as internationally important for bird conservation in 2004 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.
Populations meeting IBA criteria ('trigger species') at the site:| Species | Red List | Season (year/s of estimate) | Size | IBA criteria |
|---|---|---|---|---|
| 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 birds | A4iii |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2004. The most recent assessment (2010) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2010 | not assessed | low | very low |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | unset | poor | |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Energy production and mining | past (and unlikely to return) and no longer limiting | most of population/area (50–90%) | moderate decline (10–30% over 3 generations) | low |
| Response (conservation actions taken for the trigger species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | Action | Result |
| Little/none of area covered (<10%) | Unknown | Unknown | very low |
| Year | Protected Area | Designation (management category) | % coverage of IBA |
|---|---|---|---|
| 1972 | Hachirogata | 都道府県指定鳥獣保護区 (IV) | 5 |
| 1977 | Ogata sogen | 国指定鳥獣保護区 (IV) | 1 |
| 2004 | Hachirogata seibu | 都道府県指定鳥獣保護区 (IV) | <1 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Artificial/Aquatic & Marine | major (>10) | Rice paddies |
| Artificial/Terrestrial | major (>10) | Improved pasture land; Abandoned farmland, disturbed ground; Arable land |
| Marine Coastal/Supratidal | major (>10) |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Hachirogata (Japan). Downloaded from
https://datazone.birdlife.org/site/factsheet/hachirogata-iba-japan on 23/12/2024.