LC
Slender-billed Starling Onychognathus tenuirostris



Taxonomy

Taxonomic note

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.
Dowsett, R. J.; Forbes-Watson, A. D. 1993. Checklist of birds of the Afrotropical and Malagasy regions. Tauraco Press, Li
Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2016 Least Concern
2012 Least Concern
2009 Least Concern
2008 Least Concern
2004 Least Concern
2000 Lower Risk/Least Concern
1994 Lower Risk/Least Concern
1988 Lower Risk/Least Concern
Species attributes

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

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 2,850,000 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 Decreasing 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 - - -
Generation length (yrs) 4.1 - - -

Population justification: The global population size has not been quantified, but the species is reported to be locally very common (Feare et al. 1998).

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


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Burundi N Extant Yes
Congo, The Democratic Republic of the N Extant Yes
Eritrea N Extant Yes
Ethiopia N Extant Yes
Kenya N Extant Yes
Malawi N Extant Yes
Rwanda N Extant Yes
Tanzania N Extant Yes
Uganda N Extant Yes
Zambia N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Burundi Kibira National Park
Burundi Bururi Forest Nature Reserve
Congo, The Democratic Republic of the Mount Hoyo Reserve
Congo, The Democratic Republic of the Virunga National Park
Congo, The Democratic Republic of the Forests west of Lake Edward
Congo, The Democratic Republic of the Kahuzi-Biega National Park
Congo, The Democratic Republic of the Itombwe Mountains
Congo, The Democratic Republic of the Mount Kabobo
Eritrea Semenawi Bahri
Eritrea Senafe
Ethiopia Dessa'a forest
Ethiopia Simien Mountains National Park
Ethiopia Bahir Dar - Lake Tana
Ethiopia Borana-Saynt (Denkoro Forest)
Ethiopia Awi Zone
Ethiopia Choke mountains
Ethiopia Guassa Plateau (Menz)
Ethiopia Ankober - Debre Sina escarpment
Ethiopia Finchaa and Chomen swamps
Ethiopia Entoto Natural Park and escarpment
Ethiopia Chilimo-Gaji forest
Ethiopia Menagesha State Forest
Ethiopia Jibat forest
Ethiopia Tiro Boter - Becho forest
Ethiopia Mount Zuquala
Ethiopia Mugo highlands
Ethiopia Bale Mountains National Park
Kenya Aberdare Mountains
Kenya Mount Kenya
Kenya Cherangani Hills
Kenya Mau forest complex
Kenya Mount Elgon (Kenya)
Malawi Nyika National Park (Malawi)
Malawi South Viphya Forest Reserve
Rwanda Rugezi Marsh
Rwanda Volcans National Park
Rwanda Cyamudongo forest
Rwanda Nyungwe National Park
Tanzania Udzungwa National Park
Tanzania Livingstone Mountains forests
Tanzania Nguru Mountains
Tanzania Njombe forests
Tanzania Rubeho Mountains
Tanzania Mount Rungwe
Tanzania Udzungwa Mountains
Tanzania Ukaguru Mountains
Tanzania Uluguru Mountains
Tanzania Umalila Mountains
Tanzania Uvidunda Mountains
Uganda Mgahinga Gorilla National Park
Uganda Bwindi Impenetrable National Park
Uganda Ruwenzori (Rwenzori) Mountains National Park
Uganda Mount Elgon National Park
Zambia Nyika National Park (Zambia)
Tanzania Udzungwa Mountain Range

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Montane major resident
Grassland Subtropical/Tropical High Altitude suitable resident
Rocky areas (eg. inland cliffs, mountain peaks) major resident
Wetlands (inland) Permanent Rivers/Streams/Creeks (includes waterfalls) suitable resident
Altitude 1200 - 4250 m Occasional altitudinal limits (max) 5000 m

Recommended citation
BirdLife International (2022) Species factsheet: Onychognathus tenuirostris. Downloaded from http://www.birdlife.org on 29/06/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 29/06/2022.