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 White-eye Apalopteron familiare | LC | resident (2003) | present | A1, 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 | very poor | 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 |
| Forest | good (>90%) | very poor (<40%) | very poor |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| 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 |
| Invasive and other problematic species and genes | happening now | few individuals/small area (<10%) | moderate decline (10–30% 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 | Substantive conservation measures are being implemented, but these are not comprehensive and are limited by resources and capacity | low |
| 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) | 57 |
| 2011 | Ogasawara Islands | World Heritage Site (natural or mixed) (UA) | 68 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Forest | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Hahajima islands (Japan). Downloaded from
https://datazone.birdlife.org/site/factsheet/hahajima-islands-iba-japan on 23/12/2024.