LC
Palawan Striped Babbler Zosterornis hypogrammicus



Taxonomy

Taxonomic note

Zosterornis hypogrammicus (del Hoyo and Collar 2016) was previously listed as Stachyris hypogrammica.

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
2022 Least Concern
2016 Near Threatened B1ab(iii)
2013 Near Threatened B1ab(iii)
2012 Near Threatened B1ab(iii)
2008 Near Threatened B1a+b(iii)
2004 Near Threatened
2000 Lower Risk/Near Threatened
1996 Vulnerable
1994 Vulnerable
1988 Lower Risk/Least Concern
Species attributes

Migratory status not a migrant Forest dependency High
Land mass type Land-mass type - shelf island
Average mass -
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 1,100 medium
Extent of Occurrence breeding/resident (km2) 450
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals unknown not applicable not applicable 0
Population trend Stable poor suspected -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations 1-5 - - -
Percentage in largest subpopulation 1-89 - - -

Population justification: The global population size has not been quantified, but the species is described as common (del Hoyo et al. 2007, Allen 2020). It occurs on Mt Victoria, Mt Mataling, Mt Borangbato, Mt Mantalingajan (at the peak) and at Magtaguimbong which may function as individual subpopulations; however, the species is monotypic and individuals may therefore occasionally disperse between mountains but this requires genetic confirmation.

Trend justification: Forest cover loss in this species's range is minimal (1.0-1.5% over ten years; Global Forest Watch 2021, using Hansen et al. [2013] data and methods disclosed therein) and is not believed to be occurring at a rate greater than that of natural variation. In the absence of any additional threats, the population is therefore suspected to be stable.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Philippines N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Philippines Victoria and Anepahan Ranges
Philippines Mount Mantalingahan

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Montane major resident
Altitude 1000 - 2030 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Climate change & severe weather Habitat shifting & alteration Timing Scope Severity Impact
Future Whole (>90%) Unknown Unknown
Stresses
Indirect ecosystem effects, Ecosystem degradation

Recommended citation
BirdLife International (2022) Species factsheet: Zosterornis hypogrammicus. Downloaded from http://www.birdlife.org on 01/10/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 01/10/2022.