Danjo islands

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 2003 present A2
Streaked Shearwater Calonectris leucomelas NT breeding 2003 present A4ii
Brown Booby Sula leucogaster LC breeding 2003 present A4ii
Japanese Murrelet Synthliboramphus wumizusume VU breeding 2003 present A1
Pleske's Grasshopper-warbler Locustella pleskei VU breeding 2003 present A1
Ryukyu Robin Larvivora komadori NT resident 2003 present A2
A4iii Species group - seabirds n/a breeding 2003 min 10,000 breeding pairs A4iii

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 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
Invasive and other problematic species and genes invasive non-native/alien species/diseases - named species happening now some of area/population (10-49%) 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 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 Unknown Some limited conservation initiatives are in place low
For more information about IBA monitoring please click here

IBA Protection

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Danjogunto 国指定鳥獣保護区 416 protected area overlaps with site 416
Common fishery right area(Nagasaki) 共同漁業権区域 310,655 protected area overlaps with site 0


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

Recommended citation
BirdLife International (2021) Important Bird Areas factsheet: Danjo islands. Downloaded from on 20/09/2021.