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 |
|---|---|---|---|---|
| Japanese Woodpigeon Columba janthina | LC | resident (2003) | present | A2 |
| Bonin Woodpigeon Columba versicolor | EX | resident (1889) | present | A2 |
| Bonin White-eye Apalopteron familiare | LC | resident (2003) | present | A2 |
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 | poor | high | medium |
| 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 |
| Forest | good (>90%) | poor (40–69%) | poor |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Invasive and other problematic species and genes | happening now | most of population/area (50–90%) | moderate decline (10–30% over 3 generations) | high |
| Geological events | likely in short term (<4 years) | whole of population/area (>90%) | moderate decline (10–30% over 3 generations) | high |
| Biological resource use | happening now | some of population/area (10–49%) | slow decline (1–10% over 3 generations) | medium |
| Pollution | likely in long term (>4 years) | some of population/area (10–49%) | slow decline (1–10% over 3 generations) | medium |
| Residential and commercial development | likely in long term (>4 years) | few individuals/small area (<10%) | rapid decline (>30% over 3 generations) | low |
| Response (conservation actions taken for the trigger species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | Action | Result |
| Whole area (>90%) covered by appropriate conservation designation | No management planning has taken place | The conservation measures needed for the site are being comprehensively and effectively implemented | medium |
| Year | Protected Area | Designation (management category) | % coverage of IBA |
|---|---|---|---|
| 1972 | Ogasawara | 国立公園 (II) | 100 |
| 1980 | Ogasawara gunto | 国指定鳥獣保護区 (IV) | 100 |
| 2002 | Common fishery right area(Tokyo) | 共同漁業権区域 (VI) | 9 |
| 2007 | Ogasawara Islands | 森林生態系保護地域 (Ib) | 66 |
| 2011 | Ogasawara Islands | World Heritage Site (natural or mixed) (UA) | 69 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Forest | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Chichijima islands (Japan). Downloaded from
https://datazone.birdlife.org/site/factsheet/chichijima-islands-iba-japan on 23/12/2024.