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Location Japan, Hokkaido
Central coordinates 145o 36.00' East  43o 13.00' North
IBA criteria A4i, A4ii
Area 200 ha
Altitude 0 - 40m
Year of IBA assessment 2004

Wild Bird Society of Japan

Site description Yururi islet and Moyururi islet are uninhabited islets off Nemuro Peninsula. Yururi islet is 168.88 ha and Moyururi islet is 31 ha. Both islets appear to be around 40 m high round islets with cliffs. The cliffs are breeding sites for northern seabirds. The center of Yurui island has high moor vegetation, and marine vegetation and alpine plants are on the edge of the islet because pastured horses prevent an overgrowth of Bamboo grass. On the contrary, Moyururi islet is covered with Sasa veitchii var. because there are no large grass-eating mammals. The islands are closed to the public.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Slaty-backed Gull Larus schistisagus breeding  2004  present  A4i  Least Concern 
Rhinoceros Auklet Cerorhinca monocerata breeding  2004  present  A4ii  Least Concern 

IBA Monitoring

2010 high not assessed medium
Poor - based on little, or potentially unreliable/unrepresentative, data

Invasive & other problematic species, genes & diseases problematic native species/diseases - unspecified species happening now some of area/population (10-49%) very rapid to severe deterioration high

Whole area of site (>90%) covered by appropriate conservation designation  A management plan exists but it is out of date or not comprehensive  Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity  medium 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Yururi - Moyururi National Wildlife Special Protected Area 200 is identical to site 200  


IUCN habitat Habitat detail Extent (% of site)
Coastline Sea cliffs and rocky shores  -
Grassland   -

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Yururi and Moyururi islets. Downloaded from on 28/10/2016

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