Data Zone
The site was identified as important 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 List1 | Season | Year(s) | Size | IBA criteria |
|---|---|---|---|---|---|
| Slaty-backed Gull Larus schistisagus | LC | breeding | 2003 | present | A4i |
1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2004) may differ.
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 | unfavourable | high | low |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | habitat | - | |
| State (condition of the trigger species' habitats) | |||
|---|---|---|---|
| Habitat | Quantity (% remaining) | Quality (% carrying capacity) | Result |
| Grassland | good (> 90%) | poor (40-69%) | unfavourable |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Invasive and other problematic species and genes | happening now | majority/most of area/population (50-90%) | moderate to rapid deterioration | high |
| Pollution | likely in long term (beyond 4 years) | some of area/population (10-49%) | slow but significant deterioration | medium |
| Response (conservation actions taken for the trigger species and/or their habitats) | |||
|---|---|---|---|
| Protected areas | Management plan | Other action | Result |
| Little/none of site covered (<10%) | No management plan exists but the management planning process has begun | Some limited conservation initiatives are in place | low |
| Year | Protected Area | Designation | % overlap with IBA |
|---|---|---|---|
| 1976 | Nemuro hanto | 沿岸水産資源開発区域 | 11 |
| 2013 | Common fishery right area(Hokkaido) | 共同漁業権区域 | 22 |
| Habitat1 | Habitat detail | % of IBA |
|---|---|---|
| Grassland | - | |
| Marine Coastal/Supratidal | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Tomoshiri and Chitomoshiri islets (Japan). Downloaded from
https://datazone.birdlife.org/site/factsheet/tomoshiri-and-chitomoshiri-islets-iba-japan on 23/11/2024.