Alcedo hercules 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Coraciiformes Alcedinidae

Scientific Name: Alcedo hercules Laubmann, 1917
Common Name(s):
English Blyth's Kingfisher
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.

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2016
Date Assessed: 2016-10-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Contributor(s): Fen-qi, H.
Facilitator/Compiler(s): Benstead, P., Gilroy, J., Khwaja, N., Taylor, J., Ashpole, J
This species exists at naturally low numbers, as a result of its narrow habitat requirements, thus it may have a moderately small population, and is likely to be declining as a result of habitat loss and fragmentation throughout its range. It is therefore listed as Near Threatened.

Previously published Red List assessments:

Geographic Range [top]

Range Description:This species occurs in southern China including Hainan Island (rare), eastern Nepal (vagrant), Bhutan (rare), north-east India (rare), Bangladesh (vagrant), Myanmar (scarce to fairly common in the north, west and south), north-west Thailand (very rare visitor), Laos (uncommon to locally common in the north and Annamite mountains, scarce further south) and Vietnam (locally fairly common in west Tonkin and Annam). Given its linear distribution along rivers, and thus restricted Extent of Occurrence, the total population size is possibly moderately small.

Countries occurrence:
Bhutan; China; India; Lao People's Democratic Republic; Myanmar; Thailand; Viet Nam
Bangladesh; Nepal
Additional data:
Continuing decline in area of occupancy (AOO):Yes
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:2460000
Continuing decline in extent of occurrence (EOO):YesExtreme fluctuations in extent of occurrence (EOO):No
Continuing decline in number of locations:Unknown
Extreme fluctuations in the number of locations:NoLower elevation limit (metres):200
Upper elevation limit (metres):1200
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The global population size has not been quantified, although the population in China has been estimated at fewer than 100 breeding pairs (Brazil 2009).

Trend Justification:  Precise data on trends are lacking, but slow to moderate declines are suspected to have occurred owing to a variety of human pressures.
Current Population Trend:Decreasing
Additional data:
Number of mature individuals:UnknownContinuing decline of mature individuals:Yes
Extreme fluctuations:NoPopulation severely fragmented:No
Continuing decline in subpopulations:Unknown
Extreme fluctuations in subpopulations:NoAll individuals in one subpopulation:No

Habitat and Ecology [top]

Habitat and Ecology:This species is found along streams in evergreen forest and adjacent open country at 200-1,200 m, mainly 400-1,000 m.

Systems:Terrestrial; Freshwater
Continuing decline in area, extent and/or quality of habitat:Yes
Generation Length (years):4.4
Movement patterns:Not a Migrant

Threats [top]

Major Threat(s): This species is still widespread at low densities within its historical range, although deforestation is reducing and fragmenting its habitat, and human disturbance and river pollution are possibly also threats.

Conservation Actions [top]

Conservation Actions: Conservation Actions Underway
None are known.

Conservation Actions Proposed
Conduct repeated surveys throughout its range to clarify its current population status, as well as assess population trends and rates of range contraction. Conduct ecological studies to identify habitat associations and potential threats. Grant protection to areas of suitable habitat. Enforce laws against river pollution where applicable. Strengthen legislation against aquatic pollution throughout the species's range.

Citation: BirdLife International. 2016. Alcedo hercules. The IUCN Red List of Threatened Species 2016: e.T22683024A92973795. . Downloaded on 21 September 2018.
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