Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
Critically Endangered | Endangered | Vulnerable |
---|---|---|
C2a(i) | A3bcd+4bcd; B1ab(i,ii,iii,iv,v); C2a(i); D | A2bcd+3bcd+4bcd; B1ab(i,ii,iii,iv,v); C2a(i); D1 |
Year | Category | Criteria |
---|---|---|
2016 | Critically Endangered | C2a(i) |
2015 | Critically Endangered | C2a(i) |
2012 | Critically Endangered | C2a(i) |
2008 | Endangered | A3b,c,d; A4b,c,d; B1a+b(i,ii,iii,iv,v); C2a(i) |
2004 | Endangered | |
2000 | Endangered | |
1996 | Endangered | |
1994 | Endangered | |
1988 | Lower Risk/Least Concern |
Migratory status | not a migrant | Forest dependency | high |
Land-mass type |
shelf island |
Average mass | - |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence (breeding/resident) | 930 km2 | medium |
Number of locations | 2-5 | - |
Severely fragmented? | yes | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
Population size | 50-249 mature individuals | poor | estimated | 2012 |
Population trend | decreasing | poor | suspected | 2015-2031 |
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) | 50-79% | - | - | - |
Rate of change over the past & future 10 years/3 generations (longer of the two periods) | 50-79% | - | - | - |
Generation length | 5.4 years | - | - | - |
Population justification: The population was previously estimated at fewer than 1,000 mature individuals (BirdLife International 2001), but more recent observations indicate that there could now be fewer than 250 mature individuals remaining, thus the population is now placed in the band for 50-249 mature individuals, probably equivalent to a total population of 75-375 individuals.
Trend justification: This species is suspected to be declining rapidly owing to the on-going loss of remaining forest fragments within its small range, as well as hunting pressure. As habitat continues to be lost, the rate of decline is thought to be accelerating.
Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
---|---|---|---|---|---|---|
Philippines | extant | native | yes |
Country/Territory | IBA Name |
---|---|
Philippines | Sibutu and Tumindao Islands |
Philippines | Simunul and Manuk Manka Islands |
Philippines | Tawi-tawi Island |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Artificial/Terrestrial | Subtropical/Tropical Heavily Degraded Former Forest | suitable | resident |
Forest | Subtropical/Tropical Mangrove Vegetation Above High Tide Level | major | resident |
Forest | Subtropical/Tropical Moist Lowland | major | resident |
Altitude | Occasional altitudinal limits |
Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
---|---|---|---|---|---|---|---|---|---|
Agriculture & aquaculture | Annual & perennial non-timber crops - Agro-industry farming | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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Agriculture & aquaculture | Annual & perennial non-timber crops - Small-holder farming | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
|||||||||
Agriculture & aquaculture | Wood & pulp plantations - Scale Unknown/Unrecorded | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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Biological resource use | Hunting & trapping terrestrial animals - Intentional use (species is the target) | 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 | ||||||
|
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Energy production & mining | Mining & quarrying | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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Residential & commercial development | Commercial & industrial areas | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
Purpose | Scale |
---|---|
Sport hunting/specimen collecting | subsistence, national |
Recommended citation
BirdLife International (2024) Species factsheet: Sulu Racquet-tail Prioniturus verticalis. Downloaded from
https://datazone.birdlife.org/species/factsheet/sulu-racquet-tail-prioniturus-verticalis 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.