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 |
| Streaked Shearwater Calonectris leucomelas | NT | breeding (2003) | present | A4ii |
| Brown Booby Sula leucogaster | LC | breeding (2003) | present | A4ii |
| Japanese Murrelet Synthliboramphus wumizusume | VU | breeding (2003) | present | A1 |
| Pleske's Grasshopper-warbler Helopsaltes pleskei | VU | breeding (2003) | present | A1 |
| Ryukyu Robin Larvivora komadori | NT | resident (2003) | present | A2 |
| A4iii Species group - seabirds | n/a | breeding (2003) | min 10,000 pairs | A4iii |
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 | low |
| 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%) | 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 | some of population/area (10–49%) | moderate decline (10–30% over 3 generations) | high |
| Response (conservation actions taken for the trigger species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | Action | Result |
| Whole area (>90%) covered by appropriate conservation designation | Unknown | Some limited conservation initiatives are in place | low |
| Year | Protected Area | Designation (management category) | % coverage of IBA |
|---|---|---|---|
| 1973 | Danjogunto | 国指定鳥獣保護区 (IV) | 100 |
| 2003 | Common fishery right area(Nagasaki) | 共同漁業権区域 (VI) | 4 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Forest | - | |
| Marine Coastal/Supratidal | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Danjo islands (Japan). Downloaded from
https://datazone.birdlife.org/site/factsheet/danjo-islands-iba-japan on 22/12/2024.