NT
Lesser Fish-eagle Icthyophaga humilis



Taxonomy

Taxonomic note
The genus Icthyophaga (del Hoyo and Collar 2014) was previously spelled Ichthyophaga.

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. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.

IUCN Red List criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2016 Near Threatened A2cde+3cde+4cde; C1+2a(i)
2012 Near Threatened A2cde+3cde+4cde;C1+2a(i)
2008 Near Threatened A2b,c,e; A3b,c,e; A4b,c,e; C1; C2a(i)
2004 Near Threatened
2000 Lower Risk/Near Threatened
1994 Lower Risk/Near Threatened
1988 Lower Risk/Least Concern
Species attributes

Migratory status not a migrant Forest dependency does not normally occur in forest
Land-mass type continent
shelf island
Average mass -
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 13,700,000 km2 medium
Extent of Occurrence (non-breeding) 13,300,000 km2 medium
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size 10000-50000 mature individuals medium estimated 2011
Population trend decreasing poor suspected 1990-2042
Rate of change over the past 10 years/3 generations (longer of the two periods) 20-29% - - -
Rate of change over the future 10 years/3 generations (longer of the two periods) 20-29% - - -
Rate of change over the past & future 10 years/3 generations (longer of the two periods) 20-29% - - -
Generation length 17.3 years - - -

Population justification: The global population is preliminarily estimated to number 10,000-50,000 mature individuals, pending further research. This is roughly equivalent to 15,000-75,000 individuals in total.

Trend justification: A moderately rapid and on-going population decline is suspected on the basis of rates of habitat loss and degradation.


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Bangladesh extant native yes
Bhutan extant native yes
Brunei extant native yes
Cambodia extant native yes
China (mainland) extant native yes
India extant native yes
Indonesia extant native yes
Laos extant native yes
Malaysia extant native yes
Myanmar extant native yes
Nepal extant native yes
Thailand extant native yes
Vietnam extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Vietnam Yok Don
Nepal Barandabhar forests and wetlands
Nepal Bardia National Park
Nepal Chitwan National Park
Nepal Sukla Phanta Wildlife Reserve
Vietnam Truong Son

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands suitable resident
Wetlands (inland) Permanent Freshwater Lakes (over 8ha) suitable resident
Wetlands (inland) Permanent Rivers/Streams/Creeks (includes waterfalls) major resident
Altitude 200 - 1000 m Occasional altitudinal limits (max) 4250 m

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Pollution Agricultural & forestry effluents - Herbicides and pesticides Timing Scope Severity Impact
Ongoing Majority (50-90%) Negligible declines Low Impact: 5
Stresses
Ecosystem degradation, Reduced reproductive success

Recommended citation
BirdLife International (2024) Species factsheet: Icthyophaga humilis. Downloaded from https://datazone.birdlife.org/species/factsheet/lesser-fish-eagle-icthyophaga-humilis on 27/02/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org on 27/02/2024.