LC
Green Crombec Sylvietta virens



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
2024 Least Concern
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 medium
Land-mass type Average mass 8 g
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 9,330,000 km2 medium
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size unknown - - -
Population trend decreasing - suspected -
Generation length 3.3 years - - -

Population justification: The global population size has not been quantified, but the species is described as widespread and generally common to fairly common. The species is described as abundant in Liberia where the population is estimated at 400,000 pairs (del Hoyo et al. 2006). This species is considered to have a medium dependency on forest habitat, and tree cover is estimated to have declined by 8.7% 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 distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Angola extant native yes
Benin extant native yes
Burundi extant native yes
Cameroon extant native yes
Central African Republic extant native yes
Congo extant native yes
Congo, The Democratic Republic of the extant native yes
Côte d'Ivoire extant native yes
Equatorial Guinea extant native yes
Gabon extant native yes
Gambia extant native yes
Ghana extant native yes
Guinea extant native yes
Kenya extant native yes
Liberia extant native yes
Mali extant native yes
Nigeria extant native yes
Rwanda extant native yes
Senegal extant native yes
Sierra Leone extant native yes
South Sudan extant native yes
Sudan extant native yes
Tanzania extant native yes
Togo extant native yes
Uganda extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Angola Calandula (Quedas de Calandula)
Angola Camabatela
Angola Gabela
Angola Luachimo River (Chitato)
Angola Maiombe
Angola Quiçama
Benin Lama Forest
Cameroon Bakossi mountains
Cameroon Banyang Mbo Wildlife Sanctuary
Cameroon Boumba - Bek
Cameroon Campo Ma'an complex
Cameroon Dja Faunal Reserve
Cameroon Korup National Park
Cameroon Lobéké National Park
Cameroon Mbam Djerem National Park
Cameroon Mbam Minkom - Kala
Cameroon Mont Manengouba
Cameroon Mont Nlonako
Cameroon Mount Cameroon and Mokoko-Onge
Cameroon Mount Kupe
Cameroon Mount Rata and Rumpi Hills Forest Reserve
Cameroon Nki
Cameroon Santchou Faunal Reserve
Cameroon Yabassi
Central African Republic Bamingui-Bangoran National Park complex
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 Léfini Faunal Reserve
Congo Lower Kouilou basin
Congo Nouabalé-Ndoki National Park complex
Congo Odzala National Park complex
Congo, The Democratic Republic of the Bombo-Lumene Game Reserve
Congo, The Democratic Republic of the Forests west of Lake Edward
Congo, The Democratic Republic of the Itombwe Mountains
Congo, The Democratic Republic of the Kahuzi-Biega National Park
Congo, The Democratic Republic of the Lomako - Yekokora
Congo, The Democratic Republic of the Luki Forest Reserve
Congo, The Democratic Republic of the Maiko National Park
Congo, The Democratic Republic of the Mount Hoyo Reserve
Congo, The Democratic Republic of the Ngiri
Congo, The Democratic Republic of the Okapi Faunal Reserve
Congo, The Democratic Republic of the Salonga National Park
Congo, The Democratic Republic of the Virunga National Park
Côte d'Ivoire Azagny National Park
Côte d'Ivoire Bossematie Forest Reserve
Côte d'Ivoire Gueoule and Glo Mountain Forest Reserves
Côte d'Ivoire Lamto Ecological Research Station
Côte d'Ivoire Marahoue National Park
Côte d'Ivoire Mopri Forest Reserve
Côte d'Ivoire Parc National de Taï et Réserve de faune du N'Zo
Côte d'Ivoire Peko Mountain National Park
Côte d'Ivoire Sangbe Mountain National Park
Côte d'Ivoire Yapo and Mambo Forest Reserves
Equatorial Guinea Monte Alen National Park
Equatorial Guinea Nsork Highlands National Park
Gabon Akanda
Gabon Gamba Protected Areas Complex
Gabon Ipassa Strict Nature Reserve
Gabon Léconi grasslands
Gabon Lopé Faunal Reserve
Gabon Minkébé Forest Reserve
Gabon Ogooué delta and Mandji island
Gambia Abuko Nature Reserve
Gambia Pirang Forest Park
Ghana Ankasa Resource Reserve - Nini-Sushien National Park
Ghana Atewa Range Forest Reserve
Ghana Bia National Park and Resource Reserve
Ghana Boin River Forest Reserve
Ghana Boin Tano Forest Reserve
Ghana Bosomtwe Range Forest Reserve
Ghana Dadieso Forest Reserve
Ghana Digya National Park
Ghana Fure River Forest Reserve
Ghana Kakum National Park - Assin Attandaso Resource Reserve
Ghana Kalakpa Resource Reserve
Ghana Kyabobo National Park
Ghana Mamiri Forest Reserve
Ghana Mount Afadjato - Agumatsa Range forest
Ghana Muni-Pomadze Ramsar Site
Ghana Nsuensa-Ayiola-Bediako Forest Reserves
Ghana Pra-Sushien Forest Reserve
Ghana Subri River Forest Reserve
Ghana Tano-Ehuro Forest Reserve
Guinea Diécké
Guinea Gangan Foret Classe
Guinea Massif du Ziama
Liberia Cestos - Senkwen
Liberia Grebo
Liberia Lake Piso (Cape Mount)
Liberia Lofa-Gola-Mano Complex
Liberia Nimba mountains
Liberia Sapo
Liberia Wologizi mountains
Liberia Wonegizi mountains
Liberia Zwedru
Nigeria Afi River Forest Reserve
Nigeria Akassa forests
Nigeria Biseni forests
Nigeria Cross River National Park (Oban Division)
Nigeria Cross River National Park (Okwangwo Division) and Mbe Mountains
Nigeria Donga river basin forests
Nigeria Ebok-Kabaken
Nigeria Gashaka-Gumti National Park
Nigeria IITA Forest Reserve, Ibadan
Nigeria Omo Forest Reserve
Nigeria Sunvit Farm
Nigeria Upper Orashi forests
Sierra Leone Gola Forests
Sierra Leone Loma Mountains Non-hunting Forest Reserve
Sierra Leone Tingi Hills Non-hunting Forest Reserve
South Sudan Bengangai
South Sudan Imatong mountains
Tanzania Minziro Forest Reserve
Togo Misahöhe Forest Reserve
Uganda Budongo Forest Reserve
Uganda Bugoma Central Forest Reserve
Uganda Bwindi Impenetrable National Park
Uganda Kasyoha-Kitomi Forest Reserve
Uganda Kibale National Park
Uganda Mabira Forest Reserve
Uganda Mount Elgon National Park
Uganda Queen Elizabeth National Park and Lake George
Uganda Sango Bay area
Uganda Semliki National Park

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Plantations suitable resident
Artificial/Terrestrial Subtropical/Tropical Heavily Degraded Former Forest suitable resident
Forest Subtropical/Tropical Moist Lowland major resident
Savanna Moist suitable resident
Shrubland Subtropical/Tropical Moist suitable resident
Altitude 0 - 2260 m Occasional altitudinal limits  

Recommended citation
BirdLife International (2024) Species factsheet: Green Crombec Sylvietta virens. Downloaded from https://datazone.birdlife.org/species/factsheet/green-crombec-sylvietta-virens on 23/12/2024.
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 23/12/2024.