NT
Short-tailed Babbler Pellorneum malaccense



Taxonomy

Taxonomic note

Previously placed in Trichastoma (del Hoyo and Collar 2016) and beforehand in Malacocincla but moved to this genus following Cai et al. (2019). See remarks under P. cinereiceps.
Populations in parts of Borneo have been regarded as subspecifically distinct, but variation slight and probably clinal; proposed subspecies sordida (NE Borneo) and saturata (Bangka, Belitung, and W Borneo) both considered synonymous with poliogene, but at least first-named is genetically very distinct (Lim and Sheldon 2011) and multiple cryptic species potentially involved (Sadanandan and Rheindt 2015). Proposed subspecies feriata (from Mt Mulu, in NW Borneo), based on single specimen, has characters apparently exhibited by juveniles of this species. Two subspecies recognized.

Taxonomic source(s)
Handbook of the Birds of the World and BirdLife International. 2021. Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 6. Available at: http://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v6_Dec21.zip.

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

Red List history
Year Category Criteria
2021 Near Threatened A2c+3c+4c
2016 Near Threatened A2c+3c+4c
2012 Near Threatened A2c+3c+4c
2008 Near Threatened A2c; A3c; A4c
2004 Near Threatened
2000 Lower Risk/Near Threatened
1994 Lower Risk/Least Concern
1988 Lower Risk/Least Concern
Species attributes

Migratory status not a migrant Forest dependency Medium
Land mass type Land-mass type - continent
Land-mass type - shelf island
Average mass 21 g
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 3,190,000 medium
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 Decreasing poor inferred -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) 20-29 - - -
Decline (10 years/3 generation past and future) 20-29 - - -
Number of subpopulations - - -
Percentage in largest subpopulation - - -
Generation length (yrs) 3.82 - - -

Population justification: The global population size has not been quantified, but the species is described as fairly common to common (Robson 2000). Density estimates vary from 87-270 individuals/km2 in forest, with densities highest in interior forest, and lowest near forest edge (Fogden 1976, Moradi & Mohamed 2010). Densities in other habitat types are unknown, as such it is not possible to generate a global population estimate; however, given the densities in forest and its pan-Sundaic range, its population is unlikely to approach population thresholds (<10,000 mature individuals) for listing as threatened.

Trend justification: Estimations on rates of population decline in this species are lacking. However, given its moderate forest dependence, an ongoing rapid decline is inferred on the basis of extensive lowland forest loss throughout the Greater Sundas. Global Forest Watch (2021) data indicate forest loss of c.22-26% in the past 3 generations, and these rates are not anticipated to cease or slow in the future. Although its tolerance of secondary forest and overgrown plantations may allay some of these impacts, densities are up to three times lower at forest edge compared to the interior (Moradi & Mohamed 2010) and so it is likely habitat degradation and fragmentation detrimentally affect this species also. It is therefore suspected to undergo a decline near-equal to that of forest loss: population declines of 20-29% are therefore suspected to have occurred over the past 3 generations, and are predicted to continue in the future.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Brunei N Extant Yes
Indonesia N Extant Yes
Malaysia N Extant Yes
Myanmar N Extant Yes
Singapore N Extant Yes
Thailand N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Malaysia Nakawan Range
Malaysia Ulu Muda
Malaysia Bintang Range
Malaysia Pondok Tanjung Forest Reserve
Malaysia Belum-Temenggor
Malaysia Selangor Heritage Park
Malaysia Endau-Rompin
Malaysia Panti forest
Malaysia Krau Wildlife Reserve
Malaysia Taman Negara National Park
Malaysia South-east Pahang peat swamp forest
Malaysia Crocker Range
Malaysia Mount Kinabalu
Malaysia Kinabatangan floodplain
Malaysia Danum Valley Conservation Area
Malaysia Maliau Basin Conservation Area
Malaysia Tabin Wildlife Reserve
Malaysia Kabili-Sepilok
Malaysia Tanjung Datu-Samunsam Protected Area
Malaysia Gunung Pueh
Malaysia Sadong-Saribas coast
Malaysia Lanjak Entimau Wildlife Sanctuary
Malaysia Hose-Laga mountains
Malaysia Danum-Linau
Malaysia Similajau National Park
Malaysia Niah National Park
Malaysia Lambir Hills National Park
Malaysia Mulu - Buda Protected Area
Thailand Bala Sector, Hala-Bala Wildlife Sanctuary
Thailand Hala Sector, Hala-Bala Wildlife Sanctuary and Bang Lang National Park
Thailand Khao Banthad
Thailand Khao Luang
Thailand Khao Nor Chuchi
Thailand Thaleban

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Plantations suitable resident
Artificial/Terrestrial Subtropical/Tropical Heavily Degraded Former Forest suitable resident
Forest Subtropical/Tropical Moist Lowland major resident
Forest Subtropical/Tropical Swamp suitable resident
Shrubland Subtropical/Tropical Moist suitable resident
Wetlands (inland) Permanent Rivers/Streams/Creeks (includes waterfalls) suitable resident
Altitude 0 - 1000 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 Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Annual & perennial non-timber crops - Small-holder farming Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting - Unintentional effects: (large scale) [harvest] Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation
Biological resource use Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation
Natural system modifications Fire & fire suppression - Increase in fire frequency/intensity Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation

Recommended citation
BirdLife International (2022) Species factsheet: Pellorneum malaccense. Downloaded from http://www.birdlife.org on 27/11/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 27/11/2022.