Sites - Important Bird and Biodiversity Areas (IBAs)
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Lower Yoshinogawa river
134o 35.00' East 34o 5.00' North
0 - 6m
Year of IBA assessment
Wild Bird Society of Japan
Site description The Yoshinogawa river is the largest river in Shikoku, originating from Kamegamori (in Mt Ishizuchisan system) with the total stream length of 193 km and width at the mouth of the river of 1.3km. The lower Yoshinogawa river belongs to Tokushima Prefecture. This site extends from the both sides of the river and from the estuary up to Nadabashi bridge. Surrounding the wide water area, there are sports grounds, farm fields, paddy fields and forests of Salix on the both sides of the river. There also exist sand bars, tidal flats and reed beds in the area. Sandy tidal flats which form islands in the river mouth area expand to a maximum of 60 ha at low tide. And around the reed beds along the river, mud flats of a sludge nature are formed. Among benthic creatures, crabs are most abundant in terms of the numbers of species and individuals. Many large shorebirds come to the site to feed on abundant crabs.