EN
White-eared Night-heron Gorsachius magnificus



Taxonomy

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- C2a(i) A2cd+3cd+4cd; C2a(i); D1

Red List history
Year Category Criteria
2016 Endangered C2a(i)
2013 Endangered C2a(i)
2012 Endangered C2a(i)
2010 Endangered C2a(i)
2008 Endangered C2a(i)
2006 Endangered
2004 Endangered
2000 Endangered
1996 Critically Endangered
1994 Critically Endangered
1988 Threatened
Species attributes

Migratory status full migrant Forest dependency High
Land mass type Land-mass type - continent
Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 2,180,000 medium
Number of locations 11-100 -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 250-999 poor estimated 2005
Population trend Decreasing poor suspected -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) 30-49 - - -
Decline (10 years/3 generation past and future) 30-49 - - -
Number of subpopulations 2-100 - - -
Largest subpopulations 1-89 - - -
Generation length (yrs) 6.7 - - -

Population justification: Brazil (2009) has estimated the population in China at fewer than 100 breeding pairs. The global population is estimated at c.250-999 mature individuals (BirdLife International 2001; M. Crosby in litt. 2005). This estimate equates to 375-1,499 individuals in total, rounded here to 350-1,500 individuals. Recent records confirm the species occurs in a wider range than previously thought, and the global population size could be shown to be larger (He Fenqi in litt. 2016), but it is tentatively retained in the current range (J. Kushlan in litt. 2016).

Trend justification: This species's population is presumed to be experiencing a rapid decline owing to hunting and the clearance and fragmentation of forest, primarily owing to demands for timber or agricultural land and damming of some sites for stream regulation.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
China (mainland) N Extant Yes
Vietnam N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Vietnam Ban Thi - Xuan Lac
China (mainland) Jiulianshan Nature Reserve
China (mainland) Shennongjia Nature Reserve
China (mainland) Fujian Wuyi Shan Nature Reserve
China (mainland) Jiangkou Xiang-Mashi Zhen
China (mainland) Chebaling Nature Reserve
China (mainland) Huashui Shan
China (mainland) Dayao Shan Nature Reserve
China (mainland) Pingnan Dapeng
China (mainland) Damingshan
China (mainland) Xianhu Reservoir
China (mainland) Longhushan
China (mainland) Jianfengling
China (mainland) Houhe Nature Reserve
China (mainland) Qiandao Hu Reservoir
China (mainland) Fusui-Bapen
China (mainland) Shangsi-Biannian
China (mainland) Baixu-Qinpai
China (mainland) Fusui-Nahuang
China (mainland) Chongzuo

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major breeding
Forest Subtropical/Tropical Moist Lowland major non-breeding
Wetlands (inland) Permanent Rivers/Streams/Creeks (includes waterfalls) major breeding
Wetlands (inland) Permanent Rivers/Streams/Creeks (includes waterfalls) major non-breeding
Altitude   Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Agro-industry farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Rapid Declines Medium Impact: 7
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching - Small-holder grazing, ranching or farming Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Ecosystem degradation
Biological resource use Hunting & trapping terrestrial animals - Intentional use (species is the target) Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Species mortality
Biological resource use Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Majority (50-90%) Rapid Declines Medium Impact: 7
Stresses
Ecosystem degradation
Human intrusions & disturbance Work & other activities Timing Scope Severity Impact
Ongoing Majority (50-90%) Negligible declines Low Impact: 5
Stresses
Species disturbance, Reduced reproductive success
Natural system modifications Dams & water management/use - Dams (size unknown) Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Pollution Agricultural & forestry effluents - Herbicides and pesticides Timing Scope Severity Impact
Ongoing Majority (50-90%) Unknown Unknown
Stresses
Ecosystem degradation
Pollution Agricultural & forestry effluents - Soil erosion, sedimentation Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Ecosystem degradation
Transportation & service corridors Roads & railroads Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Food - human - - Non-trivial Recent

Recommended citation
BirdLife International (2020) Species factsheet: Gorsachius magnificus. Downloaded from http://www.birdlife.org on 06/07/2020. Recommended citation for factsheets for more than one species: BirdLife International (2020) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 06/07/2020.