LC
White-browed Jungle-flycatcher Vauriella insignis



Taxonomy

Taxonomic note

Vauriella insignis (del Hoyo and Collar 2016) was previously listed as Rhinomyias insignis.

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
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2024 Least Concern
2016 Vulnerable A2c+3c+4c;B1ab(i,ii,iii,iv,v);C2a(i)
2012 Vulnerable A2c+3c+4c;B1ab(i,ii,iii,iv,v);C2a(i)
2008 Vulnerable A2c; A3c; A4c; B1a+b(i,ii,iii,iv,v); C2a(i)
2004 Vulnerable
2000 Vulnerable
1996 Endangered
1994 Endangered
1988 Near Threatened
Species attributes

Migratory status not a migrant Forest dependency high
Land-mass type shelf island
Average mass -
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 23,900 km2 medium
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size unknown - - -
Population trend stable poor suspected -
Generation length 3.9 years - - -

Population justification: This species is described as rare and local (Dickinson et al. 1991, Poulsen 1995, Allen 2020), and the global population size has not been quantified. It is generally shy, quiet and difficult to observe (Poulsen 1995, L. Heaney in litt. 2019), but trapping studies have revealed it to be common at Balbalan-Balbalasang National Park, Kalinga Province, on Mt. Amuyao, Mountain Province, and Mt. Sicapoo, Apayao Province (L. Heaney in litt. 2007, 2019). It may have been previously under-recorded owing to its furtive nature and could prove to be more widespread, however trapping studies at various montane sites outside the Cordillera Central and Sierra Madre between 2000 and 2007 failed to find it (L. Heaney in litt. 2007). It has probably never been numerous (Poulsen 1995), though given the area of habitat remaining within the range the global population size is unlikely to be especially small.

Trend justification: This species may be affected locally by deforestation and degradation particularly in the southern third of the Central Cordillera due to logging, urbanisation and expansion of agriculture (L. Heaney in litt. 2019). However, the central and northern portions of the range have been less impacted, with some formerly logged and farmed areas beginning to regenerate (L. Heaney, pers. obs, 2010-2019). As a result, the amount of forest in the Cordillera may have stabilised or even be increasing overall (L. Heaney in litt. 2019). Remote sensing data also indicate that forest loss has been minimal (<1%) within the past three generations (Global Forest Watch 2024, using data from Hansen et al. [2013] and methods disclosed therein). Additionally, the species may not be strictly dependent on old growth forest; it has also been recorded in forest with little undergrowth as well as in second growth adjacent to oak-dominated primary forest (Poulsen 1995, Allen 2020). In the absence of evidence for any declines or substantial threats therefore, the population trend is suspected to be stable overall.


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Philippines extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Philippines Mount Pulag National Park
Philippines Northern Sierra Madre Natural Park

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Montane major resident
Altitude 950 - 2950 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Agro-industry farming Timing Scope Severity Impact
Ongoing Minority (<50%) No decline Low Impact: 4
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Annual & perennial non-timber crops - Small-holder farming Timing Scope Severity Impact
Ongoing Minority (<50%) No decline Low Impact: 4
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting - Unintentional effects: (large scale) [harvest] Timing Scope Severity Impact
Ongoing Minority (<50%) No decline Low Impact: 4
Stresses
Ecosystem degradation
Biological resource use Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Minority (<50%) No decline Low Impact: 4
Stresses
Ecosystem degradation
Residential & commercial development Housing & urban areas Timing Scope Severity Impact
Ongoing Minority (<50%) No decline Low Impact: 4
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2024) Species factsheet: White-browed Jungle-flycatcher Vauriella insignis. Downloaded from https://datazone.birdlife.org/species/factsheet/white-browed-jungle-flycatcher-vauriella-insignis 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.