Data Zone
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 |
|---|---|---|
| - | A3bc | A3bc; B1ab(ii,iii,v) |
| Year | Category | Criteria |
|---|---|---|
| 2018 | Endangered | A3bc |
| 2016 | Vulnerable | B1ab(ii,iii,v) |
| 2012 | Vulnerable | B1ab(ii,iii,v) |
| 2008 | Vulnerable | B1a+b(ii,iii,v) |
| 2004 | Vulnerable | |
| 2000 | Vulnerable | |
| 1994 | Lower Risk/Near Threatened | |
| 1988 | Lower Risk/Least Concern |
| Migratory status | not a migrant | Forest dependency | high |
| Land-mass type |
Land-mass type - shelf island |
Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence breeding/resident (km2) | 16,200 | medium |
| Number of locations | 11-100 | - |
| Severely fragmented? | yes | - |
| Value | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Number of mature individuals | 6000-15000 | poor | estimated | 2000 |
| Population trend | decreasing | medium | suspected | 1998-2008 |
| Decline % (10 years/3 generations future) | 50-79 | - | - | - |
| Number of subpopulations | 2-100 | - | - | - |
| Generation length (years) | 7.1 | - | - | - |
Population justification: The population size is preliminarily estimated to fall into the band 10,000-19,999 individuals. This equates to 6,667-13,333 mature individuals, rounded here to 6,000-15,000 mature individuals. However, the population size is now potentially lower (M. Rabenandrasana in litt. 2017).
Trend justification: The population is suspected to be declining in line with the clearance and degradation of lowland rainforest within the range. Modelling the possible effects of climate change have shown that this species's ecological niche may nearly completely disappear due to climate change over the 50 year period from 2000 to 2050 (Andriamasimanana and Cameron 2013). Depending on when climate change begins to noticeably impact the species's habitat, this could equate to a decline in its ecological niche in the range of 50-79% over its next 3 generations (21 years).
| Country/Territory | Presence | Origin | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| Madagascar | extant | native | yes |
| Country/Territory | IBA Name |
|---|---|
| Madagascar | Tsaratanana Strict Nature Reserve and extension |
| Madagascar | South Anjanaharibe Special Reserve and extension |
| Madagascar | Marojejy National Park |
| Madagascar | Masoala National Park |
| Madagascar | Anjanaharibe Classified Forest |
| Madagascar | Upper Rantabe Classified Forest |
| Madagascar | Ambatovaky Special Reserve |
| Madagascar | Bezavona Classified Forest |
| Madagascar | Zahamena National Park and Strict Reserve |
| Madagascar | Betampona Strict Nature Reserve |
| Madagascar | Mantadia National Park and Analamazaotra Special Reserve |
| Madagascar | Mananara-North Biosphere Reserve |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Forest | Subtropical/Tropical Moist Lowland | major | resident |
| Forest | Subtropical/Tropical Moist Montane | suitable | resident |
| Altitude | 0 - 1000 m | Occasional altitudinal limits |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Agriculture & aquaculture | Annual & perennial non-timber crops - Shifting agriculture | Timing | Scope | Severity | Impact | ||||
| Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
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| Biological resource use | Logging & wood harvesting - Unintentional effects: (large scale) [harvest] | Timing | Scope | Severity | Impact | ||||
| Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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| Climate change & severe weather | Habitat shifting & alteration | Timing | Scope | Severity | Impact | ||||
| Future | Whole (>90%) | Rapid Declines | Medium Impact: 6 | ||||||
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Recommended citation
BirdLife International (2023) Species factsheet: Euryceros prevostii. Downloaded from
http://datazone.birdlife.org/species/factsheet/helmet-vanga-euryceros-prevostii on 25/09/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from
http://datazone.birdlife.org on 25/09/2023.
