Northern Izu Islands - Marine

IBA Criteria

Year of most recent IBA criteria assessment: 2016

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
Tristram's Storm-petrel Hydrobates tristrami LC breeding 2014 min 68,120 nests A4ii
Streaked Shearwater Calonectris leucomelas NT breeding 2014-2016 min 2,258,860 nests A4ii
Japanese Murrelet Synthliboramphus wumizusume VU breeding 2015 min 1,019 individuals A1, A4ii

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 Protection

Protection status:

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Onoharajima 国指定鳥獣保護区 546 protected area contained by site 0
Fuji hakone izu 国立公園 166,767 protected area overlaps with site 0
Common fishery right area(Tokyo) 共同漁業権区域 102,714 protected area overlaps with site 0


IUCN Habitat Habitat detail Extent (% of site)
Sea -
For further information about the habitat classification please click here.

Recommended citation
BirdLife International (2021) Important Bird Areas factsheet: Northern Izu Islands - Marine. Downloaded from on 02/03/2021.