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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
Red-crowned Crane Grus japonensis	VU	breeding	2003	present	A1, A3
Latham's Snipe Gallinago hardwickii	NT	breeding	2003	present	A3
Steller's Sea-eagle Haliaeetus pelagicus	VU	winter	2003	present	A1
Middendorff's Grasshopper-warbler Helopsaltes ochotensis	LC	breeding	2003	present	A3
Yellow-breasted Bunting Emberiza aureola	CR	breeding	2003	present	A3

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

Threats to the site (pressure)
Threat Level 1	Threat Level 2	Timing	Scope	Severity	Result
Geological events	earthquakes/tsunamis	likely in long term (beyond 4 years)	whole area/population (>90%)	slow but significant deterioration	medium
Invasive and other problematic species and genes	invasive non-native/alien species/diseases - named species	happening now	small area/few individuals (<10%)	slow but significant deterioration	low
Transportation and service corridors	roads and railroads	likely in long term (beyond 4 years)	some of area/population (10-49%)	slow but significant deterioration	medium

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%)	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	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

Protected Area	Designation	Area (ha)	Relationship with IBA	Overlap with IBA (ha)
Kushiro tobu	沿岸水産資源開発区域	113,325	protected area overlaps with site	0
Kiritappu-shitsugen	Ramsar Site, Wetland of International Importance	2,504	protected area contained by site	2,504
Kiritappu Marsh	Reserve	2,905	protected area contained by site	2,905
Common fishery right area(Hokkaido)	共同漁業権区域	4,863,624	protected area overlaps with site	0
Akkeshi-Bekanbeushi-Kiritappu	国指定鳥獣保護区	13,064	protected area overlaps with site	0
Akkeshi	都道府県立自然公園	21,523	protected area overlaps with site	0

IUCN Habitat	Habitat detail	Extent (% of site)
Wetlands (inland)	Rivers and streams, Raised and blanket bogs, Freshwater lakes and pools, Permanent swamps	-
Marine Coastal/Supratidal		-

For further information about the habitat classification please click here.

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Recommended citation
BirdLife International (2023) Important Bird Areas factsheet: Kiritappu marsh, Biwase bay. Downloaded from http://www.birdlife.org on 07/02/2023.