Grauer's Warbler (Graueria vittata) - BirdLife species factsheet

Grauer's Warbler Graueria vittata

Current view: Data table and detailed info

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	high
Land-mass type		Average mass	-

Range

	Estimate	Data quality
Extent of Occurrence (breeding/resident)	78,600 km²	medium
Severely fragmented?	no	-

Population

	Estimate	Data quality	Derivation	Year of estimate
Population size	unknown	-	-	-
Population trend	decreasing	-	suspected	-
Generation length	2.92 years	-	-	-

Population justification: The global population size has not been quantified, but the species is reported to be scarce to locally common (Urban et al. 1997). This species is considered to have a high dependency on forest habitat, and tree cover is estimated to have declined by 11.6% within its mapped range over the past 10 years (Global Forest Watch 2022, using Hansen et al. [2013] data and methods disclosed therein). It is therefore tentatively suspected that this rate of cover loss may have led to a decline of between 1-19% in the species' population size over the same time frame, with a best estimate of reduction being 11-14%.

Trend justification: .

Country/territory distribution

Country/Territory	Presence	Origin	Resident
Burundi	extant	native	yes
Congo, The Democratic Republic of the	extant	native	yes
Rwanda	extant	native	yes
Uganda	extant	native	yes

Important Bird and Biodiversity Areas (IBA)

Country/Territory	IBA Name
Burundi	Kibira National Park
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
Rwanda	Nyungwe National Park
Uganda	Bwindi Impenetrable National Park

Habitats & altitude

Habitat (level 1)	Habitat (level 2)	Importance	Occurrence
Forest	Subtropical/Tropical Moist Montane	major	resident
Altitude	1500 - 2500 m	Occasional altitudinal limits

Recommended citation
BirdLife International (2024) Species factsheet: Grauer's Warbler Graueria vittata. Downloaded from https://datazone.birdlife.org/species/factsheet/grauers-warbler-graueria-vittata on 22/11/2024.
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 22/11/2024.