EN
Clarke's Weaver Ploceus golandi



Taxonomy

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
- B1ab(ii,iii) B1ab(ii,iii)+2ab(ii,iii); D2

Red List history
Year Category Criteria
2022 Endangered B1ab(ii,iii)
2016 Endangered C2a(ii)
2012 Endangered C2a(ii)
2008 Endangered C2a(ii)
2004 Endangered
2000 Endangered
1996 Vulnerable
1994 Vulnerable
1988 Threatened
Species attributes

Migratory status not a migrant Forest dependency Medium
Land mass type Land-mass type - continent
Average mass -
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 1,900 medium
Extent of Occurrence breeding/resident (km2) 1,084
Number of locations 1 -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 2000-4000 medium inferred 1985
Population trend Decreasing medium 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) 1-10 - - -
Decline (10 years/3 generation past and future) 1-10 - - -
Number of subpopulations 1 - - -
Percentage in largest subpopulation 100 - - -
Generation length (yrs) 3.4 - - -

Population justification: The population was estimated to be not more than 1,000-2,000 pairs in the early 1980s (Collar and Stuart 1985). No recent population assessments have been undertaken, however the population is inferred to be declining owing to continuing woodland clearance and selective and illegal logging (Craig 2020). Data from Global Forest Watch (2021, using Hansen et al. [2013] data and methods disclosed therein) suggests that this forest loss has been occurring for some time. Therefore, the population is inferred to still be less than 2,000 pairs, or 4,000 mature individuals. The population size is tentatively placed in the band 2,000-4,000 mature individuals, although clarification is needed.

Trend justification: The population is suspected to be declining at a moderate rate in line with the clearance and degradation of its forest habitat. Between 2009-2019, the species' range experienced a 4.1% reduction in forest cover (Global Forest Watch 2021, using Hansen et al. [2013] data and methods disclosed therein). The likely rate of past decline is therefore suspected to be in the band of 1-10%. However, the most serious threat to this species is drought. Over the past two years this threat is believed to have prevented any breeding events from occurring, as the species relies on very specialised seasonal wetlands (F. Ng'weno in litt. 2022). If this drought persists it has the potential to severely threaten the entire population, and therefore future declines could be significantly higher.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Kenya N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Kenya Arabuko-Sokoke Forest
Kenya Dakatcha Woodland

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Dry major resident
Wetlands (inland) Seasonal/Intermittent/Irregular Rivers/Streams/Creeks major breeding
Altitude 0 - 200 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Small-holder farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Climate change & severe weather Droughts Timing Scope Severity Impact
Ongoing Whole (>90%) Slow, Significant Declines Medium Impact: 7
Stresses
Species disturbance, Ecosystem degradation, Species mortality

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Food - human - - Non-trivial Recent

Recommended citation
BirdLife International (2022) Species factsheet: Ploceus golandi. Downloaded from http://www.birdlife.org on 29/11/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 29/11/2022.