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 |
---|---|---|
- | - | - |
Year | Category | Criteria |
---|---|---|
2020 | Near Threatened | C2a(i) |
2016 | Near Threatened | A2c+3c+4c |
2012 | Near Threatened | A2c+3c+4c |
2008 | Near Threatened | A2c; A3c; A4c |
2005 | Near Threatened | |
2004 | Not Recognised | |
2000 | Not Recognised | |
1994 | Not Recognised | |
1988 | Not Recognised |
Migratory status | not a migrant | Forest dependency | high |
Land-mass type |
continent |
Average mass | - |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence (breeding/resident) | 212,000 km2 | medium |
Number of locations | 11-100 | - |
Severely fragmented? | no | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
Population size | 2500-9999 mature individuals | poor | - | 2020 |
Population trend | decreasing | poor | inferred | 2014-2031 |
Rate of change over the past 10 years/3 generations (longer of the two periods) | 10-20% | - | - | - |
Rate of change over the future 10 years/3 generations (longer of the two periods) | 10-20% | - | - | - |
Rate of change over the past & future 10 years/3 generations (longer of the two periods) | 10-20% | - | - | - |
Generation length | 5.8 years | - | - | - |
Number of subpopulations | 2-5 | - | - | - |
Population justification: The area of suitable habitat predicted for the species in Thailand by Trisurat et al. (2013) was 1,864 km2, which, at the densities reported for this species of 2-5 individuals per km2 would result in an initial estimate of 3,700-9,300 individuals, assumed to equate to 2,479-6,231 mature individuals, rounded to 2,450-6,000 mature individuals. No more than an additional 500 are believed to be present in Myanmar (Lay Win in litt. 2020). As such, the population is placed in the band of 2,500-10,000 mature individuals.
Data is urgently required on this species's population size. Given the dwindling area of suitable primary forest habitat within its range, its population size could be small.
Trend justification: The species is suspected to be undergoing a population reduction in the range of 10-20%, largely driven by the rate of forest loss recorded within the range of the species, with likely additional impacts from habitat degradation and loss due to selective logging, and opportunistic hunting. Global Forest Change data on tree cover loss up to 2019 indicate that, over three generations (17.4 years), approximately 8.8% of tree cover with >30% canopy cover was lost from within the species’s range (Global Forest Watch 2020). The species is dependent on large trees within intact forest, and within the range the area of forest has been reduced (Global Forest Watch 2020), large trees are selectively logged and numerous roads have been constructed within the past ten years in conjunction with increasing rates of agricultural encroachment, at least in Myanmar (Lay Win in litt. 2020). The species does not occur in cleared areas (Trisurat et al. 2013). However it is not a species targeted by hunters, although it will be opportunistically hunted (Lay Win in litt. 2020). From this, the population is inferred to be suffering a continuing decline.
Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
---|---|---|---|---|---|---|
Myanmar | extant | native | yes | |||
Thailand | extant | native | yes |
Country/Territory | IBA Name |
---|---|
Thailand | Khao Yai |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Forest | Subtropical/Tropical Moist Lowland | major | resident |
Forest | Subtropical/Tropical Moist Montane | suitable | resident |
Altitude | 0 - 1500 m | 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 | ||||||
|
|||||||||
Agriculture & aquaculture | Annual & perennial non-timber crops - Small-holder farming | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
|
|||||||||
Agriculture & aquaculture | Wood & pulp plantations - Agro-industry plantations | 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 | Unknown | Unknown | Unknown | ||||||
|
|||||||||
Biological resource use | Logging & wood harvesting - Unintentional effects: (large scale) [harvest] | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
|
|||||||||
Biological resource use | Logging & wood harvesting - Unintentional effects: (subsistence/small scale) [harvest] | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
|
|||||||||
Natural system modifications | Fire & fire suppression - Increase in fire frequency/intensity | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
Purpose | Scale |
---|---|
Food - human | subsistence, national |
Pets/display animals, horticulture | international |
Recommended citation
BirdLife International (2024) Species factsheet: Tickell's Brown Hornbill Anorrhinus tickelli. Downloaded from
https://datazone.birdlife.org/species/factsheet/tickells-brown-hornbill-anorrhinus-tickelli on 03/12/2024.
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 03/12/2024.