Data Zone
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.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 2024 | Least Concern | |
| 2016 | Least Concern | |
| 2012 | Not Recognised | |
| 2008 | Not Recognised | |
| 2004 | Not Recognised | |
| 2000 | Not Recognised | |
| 1994 | Not Recognised | |
| 1988 | Not Recognised |
| 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 | 3.98 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). This species is considered to have a medium dependency on forest habitat, and tree cover is estimated to have declined by 3.8% within its mapped range over the past 10 years (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). Therefore, as a precautionary measure, it is tentatively suspected that this loss of cover may have led to a decline of between 1-19% in the species' population size over the same time frame.
Trend justification: .
| 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 | Kabili-Sepilok |
| Malaysia | Kelabit Highlands |
| Malaysia | Maliau Basin Conservation Area |
| Malaysia | Mount Kinabalu |
| Malaysia | Tabin Wildlife Reserve |
| Malaysia | Tawau Hills Park |
| Malaysia | Trus Madi Range |
| 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: Streaky-breasted Spiderhunter Arachnothera affinis. Downloaded from
https://datazone.birdlife.org/species/factsheet/streaky-breasted-spiderhunter-arachnothera-affinis on 26/12/2024.
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 26/12/2024.