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 |
---|---|---|
- | - | A2c+3c+4c |
Year | Category | Criteria |
---|---|---|
2022 | Vulnerable | A2c+3c+4c |
2016 | Vulnerable | C1+2a(i) |
2012 | Vulnerable | C2a(i) |
2008 | Vulnerable | C2a(i) |
2004 | Vulnerable | |
2000 | Vulnerable | |
1996 | Vulnerable | |
1994 | Vulnerable | |
1988 | Threatened |
Migratory status | not a migrant | Forest dependency | high |
Land-mass type |
shelf island |
Average mass | - |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence (breeding/resident) | 162,000 km2 | medium |
Severely fragmented? | no | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
Population size | 2500-9999 mature individuals | poor | suspected | 1999 |
Population trend | decreasing | medium | suspected | 2016-2026 |
Rate of change over the past 10 years/3 generations (longer of the two periods) | 30-49% | - | - | - |
Rate of change over the future 10 years/3 generations (longer of the two periods) | 30-49% | - | - | - |
Rate of change over the past & future 10 years/3 generations (longer of the two periods) | 30-49% | - | - | - |
Generation length | 2.69 years | - | - | - |
Number of subpopulations | 2-100 | - | - | - |
Percentage of mature individuals in largest subpopulation | 1-89% | - | - | - |
Population justification: The population is suspected to be in the range 2,500-9,999 mature individuals (F. Hawkins in litt. 2003). This equates to 3,750-14,999 individuals, rounded here to 3,500-15,000 individuals.
Trend justification: The population is suspected to be declining in line with the clearance and degradation of lowland rainforest within the species's range. Tree cover loss within the range is currently estimated at 30-49% across ten years (Global Forest Watch 2021, using Hansen et al. [2013] data and methods disclosed therein). Assuming that population declines are roughly equivalent to the rate of forest loss for this highly forest dependent species, it may be declining at <50% over ten years.
Modelling the possible effects of climate change have shown that this species' ecological niche may decline by 52% due to climate change over the 50 year period from 2000 to 2050 (Andriamasimanana and Cameron 2013). Assuming a linear decrease, this would equate to a c.10% decline in its ecological niche over the next ten years.
Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
---|---|---|---|---|---|---|
Madagascar | extant | native | yes |
Country/Territory | IBA Name |
---|---|
Madagascar | Ambatovaky Special Reserve |
Madagascar | Andohahela National Park - Section I |
Madagascar | Ankeniheny Classified Forest |
Madagascar | Mananara-North Biosphere Reserve |
Madagascar | Marojejy National Park |
Madagascar | South Anjanaharibe Special Reserve and extension |
Madagascar | Upper Rantabe Classified Forest |
Madagascar | Vondrozo Classified Forest NPA |
Madagascar | Zahamena National Park and Strict Reserve |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Forest | Subtropical/Tropical Moist Lowland | major | resident |
Forest | Subtropical/Tropical Moist Montane | suitable | resident |
Altitude | 100 - 900 m | Occasional altitudinal limits | (max) 1640 m |
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%) | Rapid Declines | Medium Impact: 7 | ||||||
|
|||||||||
Biological resource use | Logging & wood harvesting - Unintentional effects: (large scale) [harvest] | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | Rapid Declines | Medium Impact: 7 | ||||||
|
|||||||||
Climate change & severe weather | Habitat shifting & alteration | Timing | Scope | Severity | Impact | ||||
Future | Whole (>90%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
Recommended citation
BirdLife International (2024) Species factsheet: Red-tailed Newtonia Newtonia fanovanae. Downloaded from
https://datazone.birdlife.org/species/factsheet/red-tailed-newtonia-newtonia-fanovanae 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.