LC
White-backed Night-heron Calherodius leuconotus



Taxonomy

Taxonomic note
Calherodius leuconotus (del Hoyo and Collar 2014) was previously placed in the genus Gorsachius.

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
- - -

Red List history
Year Category Criteria
2018 Least Concern
2016 Least Concern
2012 Least Concern
2009 Least Concern
2008 Least Concern
2004 Least Concern
2000 Lower Risk/Least Concern
1994 Lower Risk/Least Concern
1988 Lower Risk/Least Concern
Species attributes

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

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 20,900,000 medium
Number of locations -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals poor suspected 2009
Population trend Decreasing inferred -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations - - -
Largest subpopulations - - -
Generation length (yrs) 6.7 - - -

Population justification: The population is suspected to be in the range 25,000-100,000 individuals (Wetlands International 2018).

Trend justification:

The species is tentatively assessed as being in decline due to habitat loss per Tracewski et al. (2016).


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Angola N Extant
Benin N Extant
Botswana N Extant
Burkina Faso N Extant
Burundi N Extant Yes
Cameroon N Extant
Congo N Extant
Congo, The Democratic Republic of the N Extant
Côte d'Ivoire N Extant
Equatorial Guinea N Extant Yes
Eritrea V Extant
Ethiopia N Extant
Gabon N Extant
Gambia N Extant
Ghana N Extant
Guinea-Bissau N Extant
Kenya N Extant
Liberia N Extant
Malawi N Extant
Mali N Extant
Mauritania V Extant
Mozambique N Extant
Namibia N Extant
Niger V Extant
Nigeria N Extant
Rwanda V Extant
Senegal N Extant
Sierra Leone N Extant
South Africa N Extant
South Sudan N Extant Yes
Sudan N Extant
Swaziland N Extant
Tanzania N Extant
Togo N Extant
Uganda N Extant
Zambia N Extant
Zimbabwe N Extant

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Botswana Okavango Delta

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Mangrove Vegetation Above High Tide Level suitable non-breeding
Forest Subtropical/Tropical Mangrove Vegetation Above High Tide Level suitable breeding
Forest Subtropical/Tropical Moist Lowland suitable non-breeding
Forest Subtropical/Tropical Moist Lowland suitable breeding
Wetlands (inland) Permanent Freshwater Lakes (over 8ha) suitable non-breeding
Wetlands (inland) Permanent Freshwater Lakes (over 8ha) suitable breeding
Wetlands (inland) Permanent Freshwater Marshes/Pools (under 8ha) suitable non-breeding
Wetlands (inland) Permanent Freshwater Marshes/Pools (under 8ha) suitable breeding
Wetlands (inland) Permanent Rivers/Streams/Creeks (includes waterfalls) suitable non-breeding
Wetlands (inland) Permanent Rivers/Streams/Creeks (includes waterfalls) suitable breeding
Wetlands (inland) Seasonal/Intermittent Freshwater Lakes (over 8ha) suitable non-breeding
Wetlands (inland) Seasonal/Intermittent Freshwater Lakes (over 8ha) suitable breeding
Wetlands (inland) Seasonal/Intermittent Freshwater Marshes/Pools (under 8ha) suitable non-breeding
Wetlands (inland) Seasonal/Intermittent Freshwater Marshes/Pools (under 8ha) suitable breeding
Altitude   Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Scale Unknown/Unrecorded Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching - Scale Unknown/Unrecorded Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines
Stresses
Ecosystem degradation, Ecosystem conversion
Natural system modifications Dams & water management/use - Abstraction of surface water (unknown use) Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines
Stresses
Ecosystem degradation
Pollution Agricultural & forestry effluents - Soil erosion, sedimentation Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines
Stresses
Ecosystem degradation

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Handicrafts, jewellery, decorations, curios Whole Adults and juveniles Wild Non-trivial Recent
Medicine - human & veterinary - - Non-trivial Recent

Recommended citation
BirdLife International (2019) Species factsheet: Calherodius leuconotus. Downloaded from http://www.birdlife.org on 22/04/2019. Recommended citation for factsheets for more than one species: BirdLife International (2019) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 22/04/2019.