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The site was identified as important in 2004 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species') at the site:

Species	Red List1	Season	Year(s)	Size	IBA criteria
Tundra Swan Cygnus columbianus	LC	winter	2003	present	A4i
Bean Goose Anser fabalis	LC	winter	2003	present	A4i
Greater White-fronted Goose Anser albifrons	LC	winter	2003	present	A4i
Schrenck's Bittern Ixobrychus eurhythmus	LC	breeding	2003	present	A3
Japanese Night Heron Gorsachius goisagi	VU	breeding	2003	present	A1, A3
Long-billed Plover Charadrius placidus	LC	breeding	2003	present	A3
Grey-faced Buzzard Butastur indicus	LC	breeding	2003	present	A3
Marsh Grassbird Helopsaltes pryeri	NT	breeding	2003	present	A1, A3
A4iii Species group - waterbirds	n/a	winter	2003	min 20,000 individuals	A4iii

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2004) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2004. The most recent assessment (2010) is shown below.

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Energy production and mining	past (and unlikely to return) and no longer limiting	majority/most of area/population (50-90%)	moderate to rapid deterioration	low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Little/none of site covered (<10%)	Unknown	Unknown	negligible

Year	Protected Area	Designation	% overlap with IBA
1972	Hachirogata	都道府県指定鳥獣保護区	5
1977	Ogata sogen	国指定鳥獣保護区	1
2004	Hachirogata seibu	都道府県指定鳥獣保護区	<1

Habitat1	Habitat detail	% of IBA
Artificial/Aquatic & Marine	Rice paddies	major (>10)
Artificial/Terrestrial	Improved pasture land, Abandoned farmland, disturbed ground, Arable land	major (>10)
Marine Coastal/Supratidal		major (>10)

1. IUCN Habitat classification.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Hachirogata (Japan). Downloaded from https://datazone.birdlife.org/site/factsheet/hachirogata-iba-japan on 22/11/2024.