LC
Sickle-billed Vanga Falculea palliata



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
2022 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 -
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 595,000 km2
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size unknown - - -
Population trend decreasing - suspected 2014-2026
Rate of change over the past 10 years/3 generations (longer of the two periods) 10-19% - - -
Rate of change over the future 10 years/3 generations (longer of the two periods) 10-19% - - -
Rate of change over the past & future 10 years/3 generations (longer of the two periods) 10-19% - - -
Generation length 3.85 years - - -

Population justification: The global population size has not been quantified, but the species is described as fairly common in western and southwestern Madagascar (Morris and Hawkins 1998, Eguchi et al. 2001).

Trend justification: This species is suspected to be declining as a result of habitat loss and degradation. The species' range lost 18% of forest cover over the past three generations (11.55 years), and tree cover loss has been accelerating since 2016 to a rate equivalent to 23% (Global Forest Watch 2021, using Hansen et al. [2013] data and methods disclosed therein). As the species prefers relatively open habitats, forest cover loss alone is unlikely to drive a rapid population decline and therefore, the rate of decline over the past three generations is tentatively placed in the band 10-19%.


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Madagascar extant native yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Madagascar Ambavanankarana wetland
Madagascar Analamerana Special Reserve
Madagascar Andavakoera Classified Forest NAP
Madagascar Andohahela National Park - Section II
Madagascar Ankarafantsika National Park and Ampijoroa
Madagascar Ankarana Special Reserve
Madagascar Baly Bay National Park
Madagascar Bemamba Wetland Complex
Madagascar Bemarivo Special Reserve
Madagascar Beza Mahafaly Special Reserve
Madagascar Cap Saint André forest and wetlands
Madagascar Daraina Forest
Madagascar Kasijy Special Reserve
Madagascar Kirindy Mite National Park and extension
Madagascar Lake Ihotry - Mangoky Delta Complex NPA
Madagascar Lake Sahaka - Analabe NPA and extension
Madagascar Mahafaly Plateau Forest complex
Madagascar Mahavavy - Kinkony wetlands NPA
Madagascar Manambolomaty wetland complex and Tsimembo Classified Forest
Madagascar Mangoky-Ankazoabo Complex NPA
Madagascar Maningoza Special Reserve
Madagascar Menabe forest complex
Madagascar Mikea
Madagascar Port-Bergé Wetlands NPA and extension
Madagascar Saint Augustin Forest
Madagascar Tambohorano Wetland NPA
Madagascar Tsimanampetsotsa National Park
Madagascar Tsingy de Bemaraha National Park and Strict Nature Reserve
Madagascar Tsingy de Namoroka National Park
Madagascar Wetlands of the Tsiribihina delta and upper Tsiribihina river
Madagascar Zombitse-Vohibasia National Park and extension

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Dry major resident
Forest Subtropical/Tropical Mangrove Vegetation Above High Tide Level suitable resident
Forest Subtropical/Tropical Moist Lowland suitable resident
Savanna Dry major resident
Shrubland Subtropical/Tropical Dry major resident
Altitude 0 - 900 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Scale Unknown/Unrecorded Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting - Unintentional effects: (large scale) [harvest] Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2024) Species factsheet: Sickle-billed Vanga Falculea palliata. Downloaded from https://datazone.birdlife.org/species/factsheet/sickle-billed-vanga-falculea-palliata on 14/12/2024.
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 14/12/2024.