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 IBA criteria.
Populations meeting IBA criteria ('key 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 status | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2015 | unfavourable | high | medium |
| Whole site assessed? | State assessed by | Accuracy of information | |
| no | habitat | - | |
| State (condition of the key species' habitats) | |||
|---|---|---|---|
| Habitat | Quantity (% remaining) | Quality (% carrying capacity) | Result |
| Forest | good (>90%) | poor (40–69%) | unfavourable |
| Pressure (threats to the key 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 deterioration (10–30% in 3 generations) | high |
| Geological events | likely in short term (within 4 years) | whole population/area (>90%) | moderate deterioration (10–30% in 3 generations) | high |
| Biological resource use | happening now | some of population/area (10–49%) | slow deterioration (1–10% over 3 generations) | medium |
| Pollution | likely in long term (beyond 4 years) | some of population/area (10–49%) | slow deterioration (1–10% over 3 generations) | medium |
| Residential and commercial development | likely in long term (beyond 4 years) | few individuals/small area (<10%) | rapid deterioration (>30% over 3 generations) | low |
| Response (conservation actions taken for the key species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | Action | Result |
| Whole area of site (>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 (2025) Important Bird Area factsheet: Chichijima islands (Japan). Downloaded from
https://datazone.birdlife.org/site/factsheet/chichijima-islands-iba-japan on 23/01/2025.