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 |
|---|---|---|---|---|
| Whooper Swan Cygnus cygnus | LC | passage (2003) | present | A4i |
| Tundra Swan Cygnus columbianus | LC | passage (2003) | present | A4i |
| Bean Goose Anser fabalis | LC | passage (2003) | present | A4i |
| Greater White-fronted Goose Anser albifrons | LC | passage (2003) | present | A4i |
| A4iii Species group - waterbirds | n/a | passage (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 (2015) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2015 | moderate | high | low |
| Whole site assessed? | State assessed by | Accuracy of information | |
| no | habitat | - | |
| State (condition of the trigger species' habitats) | |||
|---|---|---|---|
| Habitat | Quantity (% remaining) | Quality (% carrying capacity) | Result |
| Wetlands (inland) | good (>90%) | moderate (70–90%) | moderate |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Invasive and other problematic species and genes | happening now | some of population/area (10–49%) | rapid decline (>30% over 3 generations) | high |
| Agricultural expansion and intensification | happening now | some of population/area (10–49%) | moderate decline (10–30% over 3 generations) | high |
| Pollution | happening now | some of population/area (10–49%) | moderate decline (10–30% over 3 generations) | high |
| Response (conservation actions taken for the trigger species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | Action | Result |
| Little/none of area covered (<10%) | A comprehensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species | Some limited conservation initiatives are in place | low |
| Year | Protected Area | Designation (management category) | % coverage of IBA |
|---|---|---|---|
| 2002 | Miyajimanuma | 国指定鳥獣保護区 (IV) | <1 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Wetlands (inland) | - | Freshwater lakes and pools |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Middle Ishikari River basin (Japan). Downloaded from
https://datazone.birdlife.org/site/factsheet/middle-ishikari-river-basin-iba-japan on 23/12/2024.