LC
White-tailed Leaf-warbler Phylloscopus intensior



Taxonomy

Taxonomic note

Phylloscopus intensior (del Hoyo and Collar 2016) was previously listed as P. davisoni.

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.
Olsson, U.; Alström, P.; Ericson, P. G. P.; Sundberg, P. 2005. Non-monophyletic taxa and cryptic species - evidence from a molecular phylogeny of leaf-warblers (Phylloscopus, Aves). Molecular Phylogenetics and Evolution 36: 261-276.

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

Red List history
Year Category Criteria
2024 Least Concern
2016 Least Concern
2013 Least Concern
2012 Least Concern
2009 Least Concern
2008 Least Concern
2006 Least Concern
2004 Not Recognised
2000 Not Recognised
1994 Not Recognised
1988 Not Recognised
Species attributes

Migratory status altitudinal migrant Forest dependency medium
Land-mass type Average mass -
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 1,630,000 km2
Extent of Occurrence (non-breeding) 1,670,000 km2
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size unknown - - -
Population trend decreasing - suspected -
Generation length 1.93 years - - -

Population justification: The global population size has not been quantified, but the species is described as common in most of its range, although very common in Thailand (del Hoyo et al. 2006). This species is considered to have a medium dependency on forest habitat, and tree cover is estimated to have declined by 8% within its mapped range over the past 10 years (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). Therefore, as a precautionary measure, it is tentatively suspected that this loss of cover may have led to a decline of between 1-19% in the species' population size over the same time frame.

Trend justification:   .


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
China (mainland) extant native
Laos extant native
Myanmar extant native
Thailand extant native
Vietnam extant native

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Vietnam Bi Dup
Vietnam Chu Yang Sin
Vietnam Cong Troi
Vietnam Du Gia
Vietnam Fan Si Pan
Vietnam Ke Go
Vietnam Kon Ka Kinh
Vietnam Kon Plong
Vietnam Ngoc Linh
Vietnam Pu Mat
Vietnam Sinh Long
Vietnam Tam Dao
Vietnam Tuyen Lam
Vietnam Van Ban
Vietnam Vu Quang

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland suitable resident
Forest Subtropical/Tropical Moist Montane suitable resident
Forest Temperate suitable breeding
Altitude 440 - 2570 m Occasional altitudinal limits  

Recommended citation
BirdLife International (2024) Species factsheet: White-tailed Leaf-warbler Phylloscopus intensior. Downloaded from https://datazone.birdlife.org/species/factsheet/white-tailed-leaf-warbler-phylloscopus-intensior on 11/12/2024.
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 11/12/2024.