• Summary
• Text account
• Data table and detailed info
• Distribution map
• Reference and further resources

Taxonomic note
Arachnothera affinis and A. modesta (del Hoyo and Collar 2016) were previously lumped as A. affinis following Sibley & Monroe (1990, 1993). A. everetti was previously split following Sibley & Monroe (1990, 1993) but is now lumped with A. affinis (del Hoyo and Collar 2016)

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.

Red List criteria met

Critically Endangered	Endangered	Vulnerable
-	-	-

Red List history

Year	Category	Criteria
2016	Least Concern

Migratory status	not a migrant	Forest dependency	medium
Land-mass type		Average mass	24 g

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	1,520,000 km2
Severely fragmented?	no	-

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	decreasing	-	suspected	-
Generation length	4.2 years	-	-	-

Population justification: The global population size has not been quantified. The species is described as uncommon on Borneo, but commoner on Java and Bali (del Hoyo et al. 2008).

Trend justification: The population is suspected to be in decline owing to ongoing habitat destruction.

Country/Territory	Presence	Origin	Resident	Breeding visitor	Non-breeding visitor	Passage migrant
Brunei	extant	native	yes
Indonesia	extant	native	yes
Malaysia	extant	native	yes

Country/Territory	IBA Name
Malaysia	Crocker Range
Malaysia	Danum Valley Conservation Area
Malaysia	Kelabit Highlands
Malaysia	Maliau Basin Conservation Area
Malaysia	Mount Kinabalu
Malaysia	Tabin Wildlife Reserve
Malaysia	Tawau Hills Park
Malaysia	Trus Madi Range
Malaysia	Kabili-Sepilok

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Lowland	major	resident
Forest	Subtropical/Tropical Moist Montane	major	resident
Altitude	900 - 1600 m	Occasional altitudinal limits	(min) 305 m

---

Recommended citation
BirdLife International (2024) Species factsheet: Arachnothera affinis. Downloaded from https://datazone.birdlife.org/species/factsheet/streaky-breasted-spiderhunter-arachnothera-affinis on 19/04/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org on 19/04/2024.