JP081
Hachijojima 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
Japanese Woodpigeon Columba janthina NT resident 2004 present A2
Japanese Murrelet Synthliboramphus wumizusume VU breeding 2004 present A1, A4ii
Pleske's Grasshopper-warbler Locustella pleskei VU breeding 2004 present A1
Ijima's Leaf-warbler Phylloscopus ijimae VU breeding 2004 present A1, A2
Izu Thrush Turdus celaenops VU resident 2004 present A1, A2

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 not assessed low
Was the whole site covered? Yes State assessed by unset
Accuracy of information -

Threats to the site (pressure)
Threat Level 1 Threat Level 2 Timing Scope Severity Result
Invasive and other problematic species and genes problematic native species/diseases - named species happening now majority/most of area/population (50-90%) moderate to rapid deterioration high
Pollution garbage & solid waste 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
Forest 0 0 - moderate (70-90%) unfavourable

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
For more information about IBA monitoring please click here

IBA Protection

Protection status:

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Koiwa togahana 都道府県指定鳥獣保護区 227 protected area contained by site 0
Hachijo miharayama 都道府県指定鳥獣保護区 580 protected area contained by site 0
Hachijo fuji 都道府県指定鳥獣保護区 458 protected area contained by site 0
Fuji hakone izu 国立公園 166,767 protected area overlaps with site 6,948
Common fishery right area(Tokyo) 共同漁業権区域 102,714 protected area is adjacent to site 0

Habitats

IUCN Habitat Habitat detail Extent (% of site)
Forest -
Coastline Rock stacks and islands -
For further information about the habitat classification please click here.


Recommended citation
BirdLife International (2020) Important Bird Areas factsheet: Hachijojima island. Downloaded from http://www.birdlife.org on 28/09/2020.