Matinan Warbling-flycatcher Eumyias sanfordi


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 Endangered B1ab(ii,iii,iv,v)
2012 Endangered B1ab(ii,iii,iv,v)
2008 Endangered B1a+b(ii,iii,iv,v)
2004 Endangered
2000 Endangered
1996 Vulnerable
1994 Vulnerable
1988 Threatened
Species attributes

Migratory status not a migrant Forest dependency medium
Land mass type Average mass -

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 15,300 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 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 - - -
Percentage in largest subpopulation - - -

Population justification: The population size is unknown, in part due to its exact geographic limits remaining unknown. It is usually described as locally common (Lambaihang et al. 2003) or uncommon (Eaton et al. 2021). Given the total area of forest it is currently suspected to occupy (c.2,000 km2), it is possible that the population may number fewer than 10,000 mature individuals if the species proves to occur at very low density; however, it is considered more likely to exceed this, especially given it probably occurs in additional areas of forest further west. The subpopulation structure is wholly unknown: although it is monotypic, the population is disjunct and multiple subpopulations are suspected.

Trend justification: The principal threat, forest loss, is currently occurring at a negligible rate equivalent to <0.5% over the last 10 years (Global Forest Watch [2021], using data from Hansen et al. [2013] and methods disclosed herein) and only along the peripheries of the species' elevational limit. This rate is considered too low to cause a decline in mature individuals. In the absence of other threats, the population is therefore suspected to be stable.

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

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Indonesia Bogani Nani Wartabone
Indonesia Gunung Simbalang

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Montane major resident
Altitude 1300 - 2400 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Shifting agriculture Timing Scope Severity Impact
Ongoing Minority (<50%) No decline Low Impact: 4
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Minority (<50%) No decline Low Impact: 4
Ecosystem degradation
Climate change & severe weather Habitat shifting & alteration Timing Scope Severity Impact
Future Whole (>90%) Unknown Unknown
Indirect ecosystem effects, Ecosystem degradation

Recommended citation
BirdLife International (2023) Species factsheet: Eumyias sanfordi. Downloaded from on 28/05/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from on 28/05/2023.