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Location Japan, Aichi
Central coordinates 137o 18.00' East  34o 41.00' North
IBA criteria A4i
Area 900 ha
Altitude 0 - 3m
Year of IBA assessment 2004

Wild Bird Society of Japan

Site description The site consists of a sandy and muddy tidal flat, reed beds and small sized saline wetlands. The tidal flat is surrounded by embankments and towards the inland is the flood control basin, paddy fields, farmlands and derelict eel ponds. The tidal flat of Toyohashi City side is composed of sandy and muddy substances, while the tidal flat in the Tahara City side is more muddy, where oyster reefs are formed. In the saline wetlands grow rare seaside plants. Along the largest river Shiokawa, the basin is occupied by reed beds.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Greater Scaup Aythya marila winter  2004  present  A4i  Least Concern 
Grey-headed Lapwing Vanellus cinereus breeding  2004  present  A4i  Least Concern 
Little Ringed Plover Charadrius dubius breeding  2004  present  A4i  Least Concern 
Grey-tailed Tattler Tringa brevipes passage  2004  present  A4i  Near Threatened 
Whimbrel Numenius phaeopus passage  2004  present  A4i  Least Concern 
Ruddy Turnstone Arenaria interpres passage  2004  present  A4i  Least Concern 
Red-necked Stint Calidris ruficollis passage  2004  present  A4i  Least Concern 
Dunlin Calidris alpina winter  2004  present  A4i  Least Concern 

IBA Monitoring

2010 medium not assessed negligible
Poor - based on little, or potentially unreliable/unrepresentative, data

Pollution agricultural & forestry effluents - type unknown/unrecorded likely in long term (beyond 4 years) majority/most of area/population (50-90%) slow but significant deterioration medium

Little/none of site covered (<10%)  Unknown  Unknown  negligible 


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

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Recommended citation  BirdLife International (2015) Important Bird Areas factsheet: Shiokawa tidal flat. Downloaded from on 28/08/2015

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