Data Zone
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 |
|---|---|---|
| - | C2a(i) | C2a(i) |
| Year | Category | Criteria |
|---|---|---|
| 2020 | Endangered | C2a(i) |
| 2016 | Endangered | C2a(i) |
| 2013 | Endangered | C2a(i) |
| 2012 | Endangered | C2a(i) |
| 2008 | Endangered | B1a+b(i,ii,iii,v); C2a(i) |
| 2004 | Endangered | |
| 2000 | Endangered | |
| 1996 | Endangered | |
| 1994 | Endangered | |
| 1988 | Lower Risk/Least Concern |
| Migratory status | not a migrant | Forest dependency | High |
| Land mass type |
Land-mass type - continent |
Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence breeding/resident (km2) | 5,009 | medium |
| Extent of Occurrence breeding/resident (km2) | 3,612 | |
| Number of locations | - | |
| Fragmentation | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | 1000-2499 | poor | estimated | 2020 |
| 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) | - | - | - | |
| Decline (10 years/3 generation past and future) | - | - | - | |
| Number of subpopulations | 2-100 | - | - | - |
| Largest subpopulations | - | - | - |
Population justification: The population size for this species has not been directly quantified, but it is safe to estimate, given the limited sightings by researchers actively looking for the bird, that there are fewer than 1,000 pairs (M. Mills in litt. 2020) in the global population. M. Mills (in litt. 2020) reports not sighting this species in Kumbira (the best known site for this species) since 2017, and that this is not atypical across the whole of the species range. Extensive surveys along the central escarpment in 2018-2019 found three pairs over ten days of searching (M. Mills in litt. 2020). Only one pair is now known at Bango, where previously there had been several (M. Mills. in litt. 2020). It is also reported by P. Vaz Pinto (in litt. 2020) that the species is now rarely observed in Kumbira, and that only two pairs were located after several weeks of searching in 2019. Further surveys elsewhere in the range only reported one additional pair. It is also likely that over the past several years, birdwatchers have observed no more than 10 pairs (P. Vaz Pinto in litt. 2020). Additionally, L Fishpool (in litt. 2020) only observed one pair of Gabela Bush-shrike after three days actively searching for the bird in places it had been previously recorded, and using playback recordings in the hope of generating a response. Therefore, the population size is tentatively placed here in the 1,000 - 2,499 band.
Trend justification: The population is inferred to be in decline owing to the loss and degradation of the species's forest habitat through clearance and modification for cultivation (Mills, in litt. 2020; Vaz Pinto, in litt. 2020; Fishpool, in litt. 2020). The likely rate of decline, however, has not been estimated.
| Country/Territory | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| Angola | N | Extant | Yes |
| Country/Territory | IBA Name |
|---|---|
| Angola | Camabatela |
| Angola | Gabela |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Artificial/Terrestrial | Plantations | suitable | resident |
| Forest | Subtropical/Tropical Moist Montane | major | resident |
| Altitude | 730 - 1100 m | Occasional altitudinal limits |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Agriculture & aquaculture | Annual & perennial non-timber crops - Agro-industry farming | Timing | Scope | Severity | Impact | ||||
| Future | Whole (>90%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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| Agriculture & aquaculture | Annual & perennial non-timber crops - Shifting agriculture | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
|
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| Agriculture & aquaculture | Annual & perennial non-timber crops - Small-holder farming | Timing | Scope | Severity | Impact | ||||
| Ongoing | Whole (>90%) | Slow, Significant Declines | Medium Impact: 7 | ||||||
|
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| Biological resource use | Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
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| Climate change & severe weather | Habitat shifting & alteration | Timing | Scope | Severity | Impact | ||||
| Future | Whole (>90%) | Unknown | Unknown | ||||||
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| Transportation & service corridors | Roads & railroads | Timing | Scope | Severity | Impact | ||||
| Future | Majority (50-90%) | Slow, Significant Declines | Low Impact: 4 | ||||||
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Recommended citation
BirdLife International (2021) Species factsheet: Laniarius amboimensis. Downloaded from
http://www.birdlife.org on 07/03/2021.
Recommended citation for factsheets for more than one species: BirdLife International (2021) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 07/03/2021.
