LC
Schrenck's Bittern Ixobrychus eurhythmus



Taxonomy

Taxonomic source(s)
AERC TAC. 2003. AERC TAC Checklist of bird taxa occurring in Western Palearctic region, 15th Draft. Available at: http://www.aerc.eu/DOCS/Bird_taxa_of_the_WP15.xls.
AERC TAC. 2003. AERC TAC Checklist of bird taxa occurring in Western Palearctic region, 15th Draft. Available at: http://www.aerc.eu/DOCS/Bird_taxa_of_the_WP15.xls.
Christidis, L. and Boles, W.E. 2008. Systematics and taxonomy of Australian birds. CSIRO Publishing, Collingwood, Australia.
Christidis, L.; Boles, W. E. 2008. Systematics and taxonomy of Australian birds. CSIRO Publishing, Collingwood, Australia.
Cramp, S. and Perrins, C.M. 1977-1994. Handbook of the birds of Europe, the Middle East and Africa. The birds of the western Palearctic. Oxford University Press, Oxford.
Cramp, S.; Perrins, C. M. 1977-1994. Handbook of the birds of Europe, the Middle East and Africa. The birds of the western Palearctic. Oxford University Press, Oxford.
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 Least Concern
2012 Least Concern
2009 Least Concern
2008 Least Concern
2004 Least Concern
2000 Lower Risk/Least Concern
1994 Lower Risk/Near Threatened
1988 Near Threatened
Species attributes

Migratory status full migrant Forest dependency does not normally occur in forest
Land-mass type Average mass -
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 8,610,000 km2
Extent of Occurrence (non-breeding) 5,350,000 km2
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size 670-17000 mature individuals poor estimated 2009
Population trend decreasing - suspected -
Generation length 4.1 years - - -

Population justification: The global population is estimated to number c.1,000-25,000 individuals (Wetlands International 2006), roughly equivalent to 670-17,000 mature individuals. National population estimates include: c.100-10,000 breeding pairs and c.50-1,000 individuals on migration in China: < c.100,000 breeding pairs and < c.1,000 individuals on migration in Korea: < c.100 breeding pairs and < c.50 individuals on migration in Japan and c.100-10,000 breeding pairs and c.50-1,000 individuals on migration in Russia (Brazil 2009).

Trend justification: The population is suspected to be in decline owing to ongoing habitat destruction.


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Brunei extant native yes
Cambodia extant native yes
China (mainland) extant native yes
Hong Kong (China) extant vagrant yes
Indonesia extant native yes
Italy extant vagrant
Japan extant native yes
Laos extant native yes
Malaysia extant native yes
Mongolia extant vagrant
Myanmar extant native yes
North Korea extant native yes
Palau extant vagrant yes
Philippines extant native yes
Russia extant native yes
Russia (Asian) extant native yes
Singapore extant native yes
South Korea extant native yes
Taiwan, China extant native yes
Thailand extant native yes
Vietnam extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Japan Hachirogata
Japan Hotokenuma, Lake Ogawara and nearby lakes
Philippines Buguey wetlands
Russia (Asian) Arkhara lowlands
Russia (Asian) Bolon' lake
Russia (Asian) Dal'dzi lake
Russia (Asian) Kievka and Chernaya river basins
Russia (Asian) Lower Bikin river (Kenihezskaya mire)
Russia (Asian) Lower Tumen river
Russia (Asian) Udyl' lake

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Pastureland suitable breeding
Grassland Temperate suitable breeding
Marine Coastal/Supratidal Coastal Brackish/Saline Lagoons/Marine Lakes suitable non-breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands major non-breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands major breeding
Altitude   Occasional altitudinal limits  

Recommended citation
BirdLife International (2024) Species factsheet: Schrenck's Bittern Ixobrychus eurhythmus. Downloaded from https://datazone.birdlife.org/species/factsheet/schrencks-bittern-ixobrychus-eurhythmus on 22/11/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 22/11/2024.