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Location Japan, Fukui
Central coordinates 136o 11.00' East  36o 11.00' North
IBA criteria A4i
Area 7,500 ha
Altitude 0 - 10m
Year of IBA assessment 2004

Wild Bird Society of Japan

Site description The Kuzuryugawa river is the longest river in Fukui Prefecture. Near the mouth of the river there are extensive reed beds and there are sparse wood forests. But, 70% of the dry riverbed area within banks is occupied by paddy fields and farmlands. As the farmlands are at only about 1m above sea level, they turn to wetlands during winter, providing foraging and resting ground for swans and geese, and raptors also come. But as the paddy fields along the river are becoming well drained with the irrigation channels reformed into underground drains, favorable wetlands for these birds are narrowing. In the wet paddy fields near the mouth of the river, shorebirds rest during migration seasons in spring and autumn. Due to constructions of roads, dwelling houses and factories in the paddy fields area, the foraging ground for geese has been narrowed as compared to ten years ago, while the number of individuals coming to a certain foraging ground has significantly increased. The aridification of wet paddy fields as well as the adoption of double crop system coupled with decrease of re-sprouting due to autumn plowing, have also narrowed the foraging grounds for geese.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Greater White-fronted Goose Anser albifrons winter  2004  present  A4i  Least Concern 

IBA Monitoring

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

Natural system modifications other ecosystem modifications 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 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Echizen - Kaga Kaigan Quasi National Park 9,246 unknown 0  


IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Rivers and streams  -
Artificial - terrestrial Rice paddies  -

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Lower Kuzuryugawa. Downloaded from on 25/10/2016

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