Current view: Data table and detailed info
Taxonomic note
Horornis diphone (del Hoyo and Collar 2016) was previously listed as Cettia diphone.
Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.
IUCN Red List criteria met and history
Red List criteria met
Red List history
Migratory status |
full migrant |
Forest dependency |
low |
Land-mass type |
|
Average mass |
- |
Population justification: The global population size has not been quantified, but in its non-breeding range, the species is described as uncommon to locally fairly common. Race restricta is now considered to be extinct. The introduced populations on Hawaii are now considered to be common to abundant on Oahu and spreading to other islands (del Hoyo et al. 2006). National population estimates include: c.10,000-100,000 breeding pairs and c.1,000-10,000 individuals on migration in China; < c.50 individuals on migration and < c.50 wintering individuals in Taiwan; c.10,000-100,000 breeding pairs and c.1,000-10,000 individuals on migration in Korea; c.10,000-100,000 breeding pairs in Japan and c.10,000-100,000 breeding pairs and c.1,000-10,000 individuals on migration in Russia (Brazil 2009). The population is suspected to be stable in the absence of evidence for any declines or substantial threats.
Trend justification: The population is suspected to be stable in the absence of evidence for any declines or substantial threats.
Country/territory distribution
Important Bird and Biodiversity Areas (IBA)
Recommended citation
BirdLife International (2024) Species factsheet: Japanese Bush-warbler Horornis diphone. Downloaded from
https://datazone.birdlife.org/species/factsheet/japanese-bush-warbler-horornis-diphone on 23/12/2024.
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 23/12/2024.