BirdLife Data Zone

JP109

Yahagigawa estuary

Current view: Data table and detailed info

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 Scaup Aythya marila	LC	winter	2003	present	A4i
Grey-headed Lapwing Vanellus cinereus	LC	resident	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	unfavourable	negligible
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
Agricultural expansion and intensification	annual & perennial non-timber crops - scale unknown/unrecorded	happening now	majority/most of area/population (50-90%)	slow but significant deterioration	high
Energy production and mining	renewable energy	likely in short term (within 4 years)	small area/few individuals (<10%)	very rapid to severe deterioration	low

Condition of habitat (state)
Habitat	Habitat Detail	Reference Area (ha)	Actual Area (ha)	% of habitat remaining	% of carrying capacity (overall)	Result
Wetlands (inland)		0	0	good (> 90%)	poor (40-69%)	unfavourable

Conservation actions taken at site (response)
Conservation Designation	Management Planning	Conservation Action	Result
Little/none of site covered (<10%)	No management planning has taken place	Some limited conservation initiatives are in place	negligible

For more information about IBA monitoring please click here

IBA Protection

Protected Area	Designation	Area (ha)	Relationship with IBA
Mikawawan	国定公園	9,457	protected area overlaps with site
Mikawananbu	都道府県指定鳥獣保護区	720	protected area is adjacent to site
Common fishery right area(Aichi)	共同漁業権区域	32,471	protected area overlaps with site

Habitats

IUCN Habitat	Habitat detail	Extent (% of site)
Wetlands (inland)	Estuarine waters, Intertidal mud, sand or salt flats	-

For further information about the habitat classification please click here.

Recommended citation
BirdLife International (2022) Important Bird Areas factsheet: Yahagigawa estuary. Downloaded from http://www.birdlife.org on 25/06/2022.