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 |
|---|---|---|---|---|
| Black-footed Albatross Phoebastria nigripes | NT | breeding (2003) | present | A1 |
| Short-tailed Albatross Phoebastria albatrus | VU | breeding (1999) | 1,000 birds | A1, A4ii |
| Japanese Murrelet Synthliboramphus wumizusume | VU | breeding (2003) | present | A1 |
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 |
| Grassland | 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 |
| Geological events | likely in long term (>4 years) | most of population/area (50–90%) | 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 |
| Little/none of area covered (<10%) | A comprehensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species | Some limited conservation initiatives are in place | low |
| Year | Protected Area | Designation (management category) | % coverage of IBA |
|---|---|---|---|
| 1954 | Torishima | 国指定鳥獣保護区 (IV) | 100 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Grassland | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Torishima island (Japan). Downloaded from
https://datazone.birdlife.org/site/factsheet/torishima-island-iba-japan on 23/12/2024.