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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
Mallard Anas platyrhynchos	LC	winter	2003	present	A4i
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
No known threats	happening now	whole area/population (>90%)	no or imperceptible deterioration	low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Whole area of site (>90%) covered by appropriate conservation designation	A management plan exists but it is out of date or not comprehensive	Unknown	low

Year	Protected Area	Designation	% overlap with IBA
-	Lakes Oyama Kamiike and Shimoike Wildlife Protection Area (Local)	Other	-
-	Lakes Oyama Kamiike and Shimoike Prefectural National Park	Other	-
1948	Shonai kaihin	都道府県立自然公園	90
1984	Takadateyama	都道府県指定鳥獣保護区	93
2008	Oyama kamiike-Shimoike	国指定鳥獣保護区	4
2008	Oyama Kami-ike and Shimo-ike	Ramsar Site, Wetland of International Importance	4

Habitat1	Habitat detail	% of IBA
Wetlands (inland)	Freshwater lakes and pools	-

1. IUCN Habitat classification.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Lakes Oyama Kamiike and Shimoike (Japan). Downloaded from https://datazone.birdlife.org/site/factsheet/lakes-oyama-kamiike-and-shimoike-iba-japan on 23/11/2024.