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 |
|---|---|---|---|---|---|
| Japanese Murrelet Synthliboramphus wumizusume | VU | breeding | 2003 | present | A1 |
| Pleske's Grasshopper-warbler Helopsaltes pleskei | VU | breeding | 2003 | present | A1 |
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 | favourable | medium | medium |
| 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 |
| Forest | good (> 90%) | good (> 90%) | favourable |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Biological resource use | likely in long term (beyond 4 years) | whole area/population (>90%) | slow but significant deterioration | medium |
| Pollution | likely in long term (beyond 4 years) | whole area/population (>90%) | slow but significant deterioration | medium |
| Invasive and other problematic species and genes | likely in long term (beyond 4 years) | whole area/population (>90%) | no or imperceptible deterioration | low |
| Response (conservation actions taken for the trigger species and/or their habitats) | |||
|---|---|---|---|
| Protected areas | Management plan | Other action | Result |
| Whole area of site (>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 | Very little or no conservation action taking place | medium |
| Year | Protected Area | Designation | % overlap with IBA |
|---|---|---|---|
| 1956 | Genkai | 国定公園 | 100 |
| 1977 | Genkaijima | 都道府県指定鳥獣保護区 | 80 |
| 2003 | Common fishery right area(Fukuoka) | 共同漁業権区域 | 20 |
| Habitat1 | Habitat detail | % of IBA |
|---|---|---|
| Forest | - | |
| Marine Coastal/Supratidal | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Tsukuejima islets (Japan). Downloaded from
https://datazone.birdlife.org/site/factsheet/tsukuejima-islets-iba-japan on 22/11/2024.