Data Zone
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.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| 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 |
| Migratory status | not a migrant | Forest dependency | high |
| Land-mass type |
shelf island |
Average mass | 10 g |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 223,000 km2 | medium |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | unknown | - | - | - |
| Population trend | decreasing | - | inferred | 2016-2026 |
| Rate of change over the past 10 years/3 generations (longer of the two periods) | 1-15% | - | - | - |
| Rate of change over the future 10 years/3 generations (longer of the two periods) | 20-29% | - | - | - |
| Rate of change over the past & future 10 years/3 generations (longer of the two periods) | 20-29% | - | - | - |
| Generation length | 2.7 years | - | - | - |
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 | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Madagascar | extant | native | yes |
| Country/Territory | IBA Name |
|---|---|
| Madagascar | Andohahela National Park - Section I |
| Madagascar | Andringitra National Park |
| Madagascar | Bezavona Classified Forest |
| Madagascar | Kalambatritra Special Reserve |
| Madagascar | Mangerivola Special Reserve |
| Madagascar | Mantadia National Park and Analamazaotra Special Reserve |
| Madagascar | Marojejy National Park |
| Madagascar | Marotandrano Special Reserve |
| Madagascar | Ranomafana National Park and extension |
| Madagascar | South Anjanaharibe Special Reserve and extension |
| Madagascar | Tsaratanana Strict Nature Reserve and extension |
| Madagascar | Zahamena National Park and Strict Reserve |
| 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 |
| 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 | ||||||
|
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| Biological resource use | Logging & wood harvesting - Unintentional effects: (large scale) [harvest] | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Rapid Declines | Medium Impact: 6 | ||||||
|
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Recommended citation
BirdLife International (2024) Species factsheet: Wedge-tailed Tetraka Hartertula flavoviridis. Downloaded from
https://datazone.birdlife.org/species/factsheet/wedge-tailed-tetraka-hartertula-flavoviridis 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.