LC
Brown Warbler Curruca lugens



Taxonomy

Taxonomic note
Previously placed in Sylvia (del Hoyo and Collar 2016) but moved to current genus following Cai et al. (2019). Formerly also placed in genus Parisoma within family Timaliidae, but morphology, behaviour, vocalizations and mtDNA indicate that it belongs in present genus. Separation of subspecies not always possible owing to individual variation and presence of intermediates; further study required, and validity of some subspecies in need of review. Five subspecies recognized.

Taxonomic source(s)
Handbook of the Birds of the World and BirdLife International. 2021. Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 6. Available at: https://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v6_Dec21.zip.

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 15 g
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 2,460,000 km2 medium
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size unknown - - -
Population trend decreasing - suspected -
Generation length 2.77 years - - -

Population justification: The global population size has not been quantified, but the species is described as locally common in Ethiopia and more scarce elsewhere (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 5.3% 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
Congo, The Democratic Republic of the extant native yes
Ethiopia extant native yes
Kenya extant native yes
Malawi extant native yes
South Sudan extant native yes
Sudan extant native yes
Tanzania extant native yes
Uganda extant native yes
Zambia extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Congo, The Democratic Republic of the Itombwe Mountains
Congo, The Democratic Republic of the Marungu highlands
Ethiopia Bale Mountains National Park
Ethiopia Entoto Natural Park and escarpment
Ethiopia Jibat forest
Ethiopia Sululta plain
Kenya Cherangani Hills
Kenya Mount Elgon (Kenya)
Malawi Nyika National Park (Malawi)
South Sudan Imatong mountains
South Sudan Kidepo
Tanzania Ngorongoro Conservation Area
Tanzania Udzungwa Mountains
Tanzania Udzungwa National Park
Uganda Kidepo Valley National Park
Uganda Mount Elgon National Park
Zambia Mafinga Mountains
Zambia Nyika National Park (Zambia)

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Arable Land suitable resident
Forest Subtropical/Tropical Dry major resident
Savanna Dry major resident
Altitude 1400 - 3700 m Occasional altitudinal limits  

Recommended citation
BirdLife International (2024) Species factsheet: Brown Warbler Curruca lugens. Downloaded from https://datazone.birdlife.org/species/factsheet/brown-warbler-curruca-lugens 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.