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 |
| Ryukyu Green-pigeon Treron permagnus | LC | resident (2003) | present | A2 |
| Ruddy Turnstone Arenaria interpres | NT | winter (2003) | present | A4i |
| Grey-tailed Tattler Tringa brevipes | LC | passage (2003) | present | A4i |
| Bridled Tern Onychoprion anaethetus | LC | breeding (2003) | present | A4i |
| Roseate Tern Sterna dougallii | LC | breeding (2003) | present | A4i |
| Black-naped Tern Sterna sumatrana | LC | breeding (2003) | present | A4i |
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 | high |
| 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%) | 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 | most of population/area (50–90%) | 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 |
| Human intrusions and disturbance | happening now | some of population/area (10–49%) | moderate decline (10–30% over 3 generations) | high |
| Residential and commercial development | happening now | some of population/area (10–49%) | moderate decline (10–30% over 3 generations) | high |
| Transportation and service corridors | happening now | some of population/area (10–49%) | moderate decline (10–30% over 3 generations) | high |
| Climate change and severe weather | likely in short term (<4 years) | whole of population/area (>90%) | slow decline (1–10% over 3 generations) | high |
| Agricultural expansion and intensification | happening now | some of population/area (10–49%) | slow decline (1–10% over 3 generations) | medium |
| Energy production and mining | happening now | few individuals/small area (<10%) | no or slight decline (<1% over 3 generations) | low |
| Geological events | likely in long term (>4 years) | some of population/area (10–49%) | no or slight decline (<1% 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 | A comprehensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species | Substantive conservation measures are being implemented, but these are not comprehensive and are limited by resources and capacity | high |
| Year | Protected Area | Designation (management category) | % coverage of IBA |
|---|---|---|---|
| 1972 | Iriomote ishigaki | 国立公園 (II) | 21 |
| 1980 | Urabu dake | 都道府県自然環境保全地域 (V) | <1 |
| 1980 | Kubura dake | 都道府県自然環境保全地域 (V) | <1 |
| 1980 | Agarisaki | 都道府県自然環境保全地域 (V) | <1 |
| 1980 | Higawachisaki | 都道府県自然環境保全地域 (V) | <1 |
| 1981 | Nakanokamishima | 国指定鳥獣保護区 (IV) | <1 |
| 1991 | Iriomotejima Island | 森林生態系保護地域 (Ib) | 20 |
| 1992 | Iriomote | 国指定鳥獣保護区 (IV) | 7 |
| 2003 | Nagura anparu | 国指定鳥獣保護区 (IV) | <1 |
| 2003 | Yonehara ishigakinini | 生息地等保護区 (IV) | <1 |
| 2010 | Yonaguni | 国指定鳥獣保護区 (IV) | 2 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Artificial/Terrestrial | major (>10) | |
| Forest | major (>10) | |
| Marine Intertidal | major (>10) | |
| Marine Coastal/Supratidal | minor (<10) |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Yaeyama islands (Japan). Downloaded from
https://datazone.birdlife.org/site/factsheet/yaeyama-islands-iba-japan on 23/12/2024.