NT
Wedge-tailed Tetraka Hartertula flavoviridis



Taxonomy

Taxonomic note

Hartertula flavoviridis (del Hoyo and Collar 2016) was previously listed as Neomixis flavoviridis.

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
2021 Near Threatened A3c+4c
2016 Near Threatened A3c
2012 Near Threatened A3c;C2a(i)
2008 Near Threatened A3c; C2a(i)
2004 Near Threatened
2000 Lower Risk/Near Threatened
1994 Lower Risk/Near Threatened
1988 Near Threatened
Species attributes

Migratory status not a migrant Forest dependency High
Land mass type Land-mass type - shelf island
Average mass 10 g
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 223,000 medium
Number of locations -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals unknown not applicable not applicable 0
Population trend Decreasing inferred -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) 20-29 - - -
Decline (10 years/3 generation past and future) 20-29 - - -
Number of subpopulations - - -
Percentage in largest subpopulation - - -

Population justification: The global population size has not been quantified, but the species is described as nowhere common (del Hoyo et al. 2006).

Trend justification: The population is inferred to be in decline owing to ongoing habitat destruction and fragmentation (del Hoyo et al. 2006; Global Forest Watch 2020).
Between 2001-2019, the range experienced forest loss of 20% (Global Forest Watch 2020). This equates to a loss of 12% over the past three generations. Assuming that the population declines at a similar rate, the past rate of decline is placed in the band 1-15% over three generations. Between 2016-2019, the lost 7.8% of forest cover (Global Forest Watch 2020). Projected forward over three generations, this equates to a loss of c.24%. Assuming that the population declines at a similar rate, the suspected future rate of decline is placed in the band 20-29% over three generations.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Madagascar N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Madagascar Tsaratanana Strict Nature Reserve and extension
Madagascar South Anjanaharibe Special Reserve and extension
Madagascar Marojejy National Park
Madagascar Marotandrano Special Reserve
Madagascar Bezavona Classified Forest
Madagascar Zahamena National Park and Strict Reserve
Madagascar Mangerivola Special Reserve
Madagascar Mantadia National Park and Analamazaotra Special Reserve
Madagascar Andohahela National Park - Section I
Madagascar Ranomafana National Park and extension
Madagascar Andringitra National Park
Madagascar Kalambatritra Special Reserve

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland suitable resident
Forest Subtropical/Tropical Moist Montane major resident
Altitude 600 - 1400 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Small-holder farming Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting - Unintentional effects: (large scale) [harvest] Timing Scope Severity Impact
Ongoing Minority (<50%) Rapid Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2022) Species factsheet: Hartertula flavoviridis. Downloaded from http://www.birdlife.org on 01/12/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 01/12/2022.