JP087
Nishinoshima island


IBA Criteria

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
Greater Crested Tern Thalasseus bergii LC breeding 2003 present A4i

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


IBA Monitoring

Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2015 high very unfavourable medium
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
Geological events volcanic eruptions happening now majority/most of area/population (50-90%) moderate to rapid deterioration high

Condition of habitat (state)
Habitat Habitat Detail Reference Area (ha) Actual Area (ha) % of habitat remaining % of carrying capacity (overall) Result
Grassland 0 0 good (> 90%) very poor (< 40%) very unfavourable

Conservation actions taken at site (response)
Conservation Designation Management Planning Conservation 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
For more information about IBA monitoring please click here

IBA Protection

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Ogasawara Islands World Heritage Site (natural or mixed) 7,939 protected area contains site 25
Ogasawara 国立公園 127,978 protected area contains site 0
Nishinoshima 国指定鳥獣保護区 29 protected area contains site 0

Habitats

IUCN Habitat Habitat detail Extent (% of site)
Coastline Sea cliffs and rocky shores -
Grassland -
For further information about the habitat classification please click here.


Recommended citation
BirdLife International (2021) Important Bird Areas factsheet: Nishinoshima island. Downloaded from http://www.birdlife.org on 07/12/2021.