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 |
|---|---|---|---|---|
| Slaty-backed Gull Larus schistisagus | LC | breeding (2003) | present | A4i |
| Rhinoceros Auklet Cerorhinca monocerata | LC | breeding (2003) | present | A4ii |
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 | |
| yes | habitat | - | |
| State (condition of the trigger species' habitats) | |||
|---|---|---|---|
| Habitat | Quantity (% remaining) | Quality (% carrying capacity) | Result |
| Grassland | good (>90%) | very poor (<40%) | very poor |
| 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 |
| Climate change and severe weather | likely in short term (<4 years) | whole of population/area (>90%) | slow decline (1–10% over 3 generations) | high |
| Energy production and mining | likely in long term (>4 years) | some of population/area (10–49%) | moderate decline (10–30% over 3 generations) | medium |
| Biological resource use | happening now | few individuals/small area (<10%) | slow decline (1–10% over 3 generations) | low |
| Human intrusions and disturbance | happening now | few individuals/small area (<10%) | slow decline (1–10% over 3 generations) | low |
| Geological events | likely in short term (<4 years) | some of population/area (10–49%) | no or slight decline (<1% over 3 generations) | low |
| Pollution | likely in long term (>4 years) | few individuals/small area (<10%) | no or slight decline (<1% over 3 generations) | low |
| Residential and commercial development | likely in long term (>4 years) | few individuals/small area (<10%) | 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 |
| Some of area covered (10–49%) | 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 |
|---|---|---|---|
| 1976 | Yururi To | 都道府県自然環境保全地域 (V) | 64 |
| 1982 | Yururi-Moyururi | 国指定鳥獣保護区 (IV) | 100 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Grassland | - | |
| Marine Coastal/Supratidal | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Yururi and Moyururi islets (Japan). Downloaded from
https://datazone.birdlife.org/site/factsheet/yururi-and-moyururi-islets-iba-japan on 23/12/2024.