VU
Pink-headed Warbler Cardellina versicolor



Taxonomy

Taxonomic note
Cardellina versicolor (del Hoyo and Collar 2016) was previously placed in the genus Ergaticus following AOU (1998 & supplements); Sibley & Monroe (1990, 1993); Stotz et al. (1996).

Taxonomic source(s)
AOU. 1998. Check-list of North American birds. American Ornithologists' Union, Washington, D.C.
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.
Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.
Stotz, D. F.; Fitzpatrick, J. W.; Parker, T. A.; Moskovits, D. K. 1996. Neotropical birds: ecology and conservation. University of Chicago Press, Chicago.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - B1ab(i,ii,iii,v)

Red List history
Year Category Criteria
2016 Vulnerable B1ab(i,ii,iii,v)
2012 Vulnerable B1ab(i,ii,iii,v)
2008 Vulnerable B1a+b(i,ii,iii,v)
2004 Vulnerable
2000 Vulnerable
1994 Lower Risk/Near Threatened
1988 Lower Risk/Least Concern
Species attributes

Migratory status not a migrant Forest dependency High
Land mass type Land-mass type - continent
Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 17,000 medium
Number of locations 6-10 -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals poor estimated 2010
Population trend Decreasing poor suspected -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) 1-9 - - -
Decline (10 years/3 generation past and future) 1-9 - - -
Number of subpopulations 2-100 - - -
Largest subpopulations - - -
Generation length (yrs) 3.9 - - -

Population justification: In Guatemala, the species is common in oak-alder-conifer forest above the elevation of 2,300 m, but less common in cloud forests at the same elevation. In high-elevation (2,000-2,500 m) cloud forest on the Atlantic slope, a density of 0.25 individuals/ha was estimated. A rough GIS analysis using a national vegetation cover mapping (1:50,000) based on aerial imagery from 2003 indicates that there are about 3,800 km2 of potential habitat in Guatemala. Within this area it has been reported within nine IBAs. The total population in the recently defined Guatemalan IBAs is assumed to be between 19,000 and 54,000 individuals (K. Eisermann unpubl. data). The species occurs also in disturbed forests and adjacent scrub. Data quality is poor, but most likely the total population is larger than previously estimated. It is precautionarily placed in the band 20,000-49,999 individuals.

Trend justification: The species is suspected to be in slow decline, owing to habitat degradation.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Guatemala N Extant Yes
Mexico N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Guatemala Antigua Guatemala
Guatemala Atitlan
Guatemala Cerro Miramundo
Guatemala Cuchumatanes
Guatemala Cuilco
Guatemala Santiaguito Volcano (part of Guatemalan/Mexican Pacific Coastal Mountains AZE)
Guatemala Sierra de las Minas - Motagua
Guatemala Yalijux
Mexico Cerro Saybal-Cerro Cavahlná
Mexico Cerros de Chalchihuitán
Mexico Cordón Jolvit
Mexico Hills of San Cristóbal of the Casas
Mexico Mountains of the North of Chiapas
Mexico Sierra Anover
Mexico The Tacaná
Mexico White hill, The Yerbabuena and Jotolchén

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Montane major resident
Altitude 1800 - 3500 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Annual & perennial non-timber crops Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Gathering terrestrial plants Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Species disturbance
Biological resource use Logging & wood harvesting Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation
Energy production & mining Mining & quarrying Timing Scope Severity Impact
Ongoing Minority (<50%) Rapid Declines Medium Impact: 6
Stresses
Species disturbance, Ecosystem degradation, Ecosystem conversion
Geological events Volcanoes Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Human intrusions & disturbance Work & other activities Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Species disturbance
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Species disturbance, Reduced reproductive success
Transportation & service corridors Roads & railroads Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2018) Species factsheet: Cardellina versicolor. Downloaded from http://www.birdlife.org on 20/09/2018. Recommended citation for factsheets for more than one species: BirdLife International (2018) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 20/09/2018.