Data Zone
Year of most recent IBA criteria assessment: 2004
Populations of IBA trigger species| Species | Current IUCN Red List Category | Season | Year(s) of estimate | Population estimate | IBA Criteria Triggered |
|---|---|---|---|---|---|
| Japanese Murrelet Synthliboramphus wumizusume | VU | breeding | 2003 | present | A1, A4ii |
| Pleske's Grasshopper-warbler Helopsaltes pleskei | VU | breeding | 2003 | present | A1 |
Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.
For more information about the IBA assessment process and criteria please click here
| Most recent IBA monitoring assessment | |||
|---|---|---|---|
| Year of assessment | Threat score (pressure) | Condition score (state) | Action score (response) |
| 2015 | medium | near favourable | low |
| Was the whole site covered? | Yes | State assessed by | Habitat |
| Accuracy of information | - | ||
| Threats to the site (pressure) | |||||
|---|---|---|---|---|---|
| Threat Level 1 | Threat Level 2 | Timing | Scope | Severity | Result |
| Biological resource use | hunting & collecting terrestrial animals - unintentional effects (species is not the target) | happening now | small area/few individuals (<10%) | no or imperceptible deterioration | low |
| Climate change and severe weather | storms and floods | happening now | some of area/population (10-49%) | slow but significant deterioration | medium |
| Human intrusions and disturbance | recreational activities | happening now | small area/few individuals (<10%) | slow but significant deterioration | low |
| Pollution | garbage & solid waste | likely in long term (beyond 4 years) | small area/few individuals (<10%) | no or imperceptible deterioration | low |
| Condition of habitat (state) | ||||||
|---|---|---|---|---|---|---|
| Habitat | Habitat Detail | Reference Area (ha) | Actual Area (ha) | % of habitat remaining | % of carrying capacity (overall) | Result |
| Forest | 0 | 0 | good (> 90%) | moderate (70-90%) | near favourable | |
| Conservation actions taken at site (response) | |||
|---|---|---|---|
| Conservation Designation | Management Planning | Conservation Action | Result |
| Whole area of site (>90%) covered by appropriate conservation designation | No management planning has taken place | Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity | low |
| Protected Area | Designation | Area (ha) | Relationship with IBA | Overlap with IBA (ha) |
|---|---|---|---|---|
| Nippokaigan | 国定公園 | 8,518 | protected area contains site | 8 |
| Makiyama | 都道府県指定鳥獣保護区 | 1,457 | protected area contains site | 0 |
| Common fishery right area(Miyazaki) | 共同漁業権区域 | 37,323 | protected area overlaps with site | 0 |
| Birojima | 国指定鳥獣保護区 | 482 | protected area contains site | 0 |
| IUCN Habitat | Habitat detail | Extent (% of site) |
|---|---|---|
| Forest | - | |
| Coastline | Sea cliffs and rocky shores | - |
| Marine Coastal/Supratidal | - |
Recommended citation
BirdLife International (2023) Important Bird Areas factsheet: Birojima islet. Downloaded from
http://www.birdlife.org on 07/02/2023.
