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The site was identified as internationally important for bird conservation 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 List	Season (year/s of estimate)	Size	IBA criteria
Greater Scaup Aythya marila	LC	winter (2003)	present	A4i
Kentish Plover Charadrius alexandrinus	LC	resident (2003)	present	A4i
Sanderling Calidris alba	LC	winter (2003)	present	A4i
Grey-tailed Tattler Tringa brevipes	LC	passage (2003)	present	A4i

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2004. The most recent assessment (2015) is shown below.

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Human intrusions and disturbance	happe­ning now	few indivi­duals/small area (<10%)	moderate decline (10–30% over 3 gener­ations)	low

Response (conservation actions taken for the trigger species and/or their habitats)
Designation	Planning	Action	Result
Little/none of area covered (<10%)	A compre­hensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species	Substantive conservation measures are being implemented, but these are not compre­hensive and are limited by resources and capacity	low

Year	Protected Area	Designation (management category)	% coverage of IBA
1958	Minamiboso	国定公園 (V)	8
2003	Common fishery right area(Chiba)	共同漁業権区域 (VI)	94

Habitat	% of IBA	Habitat detail
Marine Intertidal	major (>10)
Marine Neritic	major (>10)

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Banzu and Futtsu tidal flat (Japan). Downloaded from https://datazone.birdlife.org/site/factsheet/banzu-and-futtsu-tidal-flat-iba-japan on 27/12/2024.