LC
White-bearded Greenbul Criniger ndussumensis



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
- - -

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 23 g
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 2,630,000 medium
Number of locations -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals unknown not applicable not applicable 0
Population trend Stable 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 - - -
Largest subpopulations - - -
Generation length (yrs) 3.5 - - -

Population justification: The global population size has not been quantified, but the species is reported to be rarer than C. calurus (Keith et al. 1992).

Trend justification: The population is suspected to be stable in the absence of evidence for any declines or substantial threats.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Cameroon N Extant Yes
Central African Republic N Extant Yes
Congo N Extant Yes
Congo, The Democratic Republic of the N Extant Yes
Equatorial Guinea N Extant Yes
Gabon N Extant Yes
Nigeria N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Cameroon Bakossi mountains
Cameroon Boumba - Bek
Cameroon Campo Ma'an complex
Cameroon Dja Faunal Reserve
Cameroon Korup National Park
Cameroon Lobéké National Park
Cameroon Mont Nlonako
Cameroon Mount Cameroon and Mokoko-Onge
Cameroon Mount Kupe
Cameroon Nki
Cameroon Yabassi
Central African Republic Bangui
Central African Republic Dzanga-Ndoki National Park
Central African Republic Ngotto
Congo Conkouati National Park
Congo Dimonika Biosphere Reserve
Congo Lake Télé Community Reserve
Congo Lower Kouilou basin
Congo Nouabalé-Ndoki National Park complex
Congo Odzala National Park complex
Congo, The Democratic Republic of the Itombwe Mountains
Congo, The Democratic Republic of the Lomako - Yekokora
Congo, The Democratic Republic of the Ngiri
Congo, The Democratic Republic of the Okapi Faunal Reserve
Equatorial Guinea Monte Alen National Park
Equatorial Guinea Nsork Highlands National Park
Gabon Gamba Protected Areas Complex
Gabon Ipassa Strict Nature Reserve
Gabon Lopé Faunal Reserve
Gabon Minkébé Forest Reserve
Nigeria Afi River Forest Reserve
Nigeria Akassa forests
Nigeria Cross River National Park (Oban Division)
Nigeria IITA Forest Reserve, Ibadan
Nigeria Okomu National Park
Nigeria Omo Forest Reserve

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major resident
Forest Subtropical/Tropical Swamp suitable resident
Altitude   Occasional altitudinal limits  

Recommended citation
BirdLife International (2019) Species factsheet: Criniger ndussumensis. Downloaded from http://www.birdlife.org on 12/11/2019. Recommended citation for factsheets for more than one species: BirdLife International (2019) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 12/11/2019.