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Location Japan, Aichi
Central coordinates 136o 53.00' East  34o 48.00' North
IBA criteria A4i
Area 331 ha
Altitude 0 - 30m
Year of IBA assessment 2004

Wild Bird Society of Japan

Site description It is one of the largest breeding sites of Great Cormorant in Japan. Great Cormorants have occurred in this site since around 1829 and they were historically well protected because their droppings could be utilized as fertilizer. Around 12.17 ha of the area surrounding Unoyama has been designated as a National Natural Monument for the breeding colony of Great Cormorant.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Great Cormorant Phalacrocorax carbo winter  2004  present  A4i  Least Concern 

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Mikawa Wan Quasi National Park 9,443 unknown 0  


IUCN habitat Habitat detail Extent (% of site)
Forest   -
Wetlands (inland) Freshwater lakes and pools  -

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Unoyama. Downloaded from on 23/10/2016

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