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Location China (mainland), Guizhou
Central coordinates 104o 15.00' East  26o 50.00' North
IBA criteria A1, A4i, A4iii
Area 12,000 ha
Altitude 2,020 - 2,854m
Year of IBA assessment 2009

Site description Located in the west of Weining County. Cao Hai is a freshwater lake at 2,170 m, with a rich growth of water plants in the lake, and marshes and meadows.

Key Biodiversity 

Non-bird biodiversity: The amphibian Rana weiningensis is endemic to this area.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Baer's Pochard Aythya baeri winter  2008  present  A1  Critically Endangered 
Bar-headed Goose Anser indicus unknown  2008  present  A4i  Least Concern 
Ruddy Shelduck Tadorna ferruginea unknown  2008  present  A4i  Least Concern 
Gadwall Mareca strepera unknown  2008  present  A4i  Least Concern 
Eurasian Wigeon Mareca penelope winter  2008  present  A4i  Least Concern 
Eastern Imperial Eagle Aquila heliaca passage  2008  present  A1  Vulnerable 
Common Coot Fulica atra unknown  2008  present  A4i  Least Concern 
Black-necked Crane Grus nigricollis winter  2008  present  A1, A4i  Vulnerable 
A4iii Species group - waterbirds unknown  2008  present  A4iii   

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Caohai Nature Reserve 12,000 is identical to site 12,000  


IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland)   -
Artificial - terrestrial   -

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Cao Hai Nature Reserve. Downloaded from on 28/10/2016

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