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) | C2a(i); D1 |
Year | Category | Criteria |
---|---|---|
2020 | Endangered | C2a(i) |
2016 | Endangered | C2a(i) |
2013 | Endangered | C2a(i) |
2012 | Endangered | C2a(i) |
2008 | Endangered | C2a(i) |
2004 | Endangered | |
2000 | Endangered | |
1996 | Vulnerable | |
1994 | Vulnerable | |
1988 | Threatened |
Migratory status | not a migrant | Forest dependency | High |
Land mass type |
Land-mass type - continent |
Average mass | - |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence breeding/resident (km2) | 56,300 | medium |
Number of locations | 6-10 | - |
Severely Fragmented | - |
Value | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
No. of mature individuals | 600-1700 | medium | estimated | 2000 |
Population trend | Decreasing | poor | inferred | - |
Decline (3 years/1 generation past) | - | - | - | |
Decline (5 years/1 generation past) | - | - | - | |
Decline (10 years/1 generation past) | - | - | - | |
Decline (10 years/3 generation future) | 20-29 | - | - | - |
Decline (10 years/3 generation past and future) | 20-29 | - | - | - |
Number of subpopulations | 2-100 | - | - | - |
Percentage in largest subpopulation | - | - | - | |
Generation length (yrs) | 9.55 | - | - | - |
Population justification: The population is thought to number 1,000-2,499 individuals, based on an estimate of 1,000 in late 1970s and more recent information that some areas such as El Triunfo may be secure and hold relatively high densities. The core of this biosphere reserve alone could hold a population of 2,475-3,685 birds, but the band of 1,000-2,499 individuals is precautionarily retained here. This estimate equates to 667-1,666 mature individuals, rounded here to 600-1,700 mature individuals. Population density estimates for El Triunfo are 2.6-5.2 individuals/km2 (González-García 1992, 1994), 4.5-7.1 individuals/km2 (Gomez de Silva et al. 1999) and 3.7 individuals/km2 (Abundis-Santamaría and González-García 2006), equivalent to a population of 2,475-3,685 birds for the core of the biosphere reserve (González-García 2005, SEMARNAT 2011). In Guatemala, at Volcán San Pedro the estimates are 10.5 individuals/km2 (Rivas Romero and Cóbar Carranza 2008) and for Sierra de las Minas the estimates are 1.6 individuals/km2 (Quiñonez 2010).
Trend justification: The population is suspected to be declining, in line with the clearance and degradation of cloud-forest within its range, estimated to be occurring at rates of ~4% per three generations (Tracewski et al. 2016). Due to potentially high levels of hunting and trapping, the rate of population decline is tentatively placed in the band 20-29% over three generations.
Country/Territory | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
---|---|---|---|---|---|---|
Guatemala | N | Extant | Yes | |||
Mexico | N | Extant | Yes |
Country/Territory | IBA Name |
---|---|
Guatemala | Atitlan |
Guatemala | Cerro El Amay |
Guatemala | Sierra de las Minas - Motagua |
Guatemala | Tacana - Tajumulco |
Guatemala | Santiaguito Volcano |
Guatemala | Antigua Guatemala |
Guatemala | Cuchumatanes |
Mexico | Chimalapas |
Mexico | El Tacaná |
Mexico | El Triunfo |
Mexico | Peña Blanca |
Mexico | Cerro Mozotal - Tacaná |
Mexico | Montebello II |
Mexico | Subcuenca Sesecapa |
Mexico | Pico de Loro El Paxtal - El Triunfo |
Mexico | La Frailescana |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Forest | Subtropical/Tropical Moist Montane | major | resident |
Altitude | 1400 - 3500 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 | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
|
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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%) | 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 | ||||
Past, Likely to Return | Majority (50-90%) | Slow, Significant Declines | Past Impact | ||||||
|
|||||||||
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 | ||||||
|
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Climate change & severe weather | Habitat shifting & alteration | Timing | Scope | Severity | Impact | ||||
Future | Whole (>90%) | Unknown | Unknown | ||||||
|
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Invasive and other problematic species, genes & diseases | Invasive non-native/alien species/diseases - Bos taurus | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
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Transportation & service corridors | Roads & railroads | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
Purpose | Primary form used | Life stage used | Source | Scale | Level | Timing |
---|---|---|---|---|---|---|
Food - human | - | - | Non-trivial | Recent | ||
Pets/display animals, horticulture | - | - | International | Non-trivial | Recent |
Recommended citation
BirdLife International (2022) Species factsheet: Oreophasis derbianus. Downloaded from
http://www.birdlife.org on 27/06/2022.
Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 27/06/2022.