VU
White-tailed Shrike-tyrant Agriornis albicauda



Taxonomy

Taxonomic note

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.
SACC. 2006. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.html#.
SACC. 2006. A classification of the bird species of South America. Available at: #http://www.museum.lsu.edu/~Remsen/SACCBaseline.htm#.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - C2a(i)

Red List history
Year Category Criteria
2016 Vulnerable C2a(i)
2012 Vulnerable C2a(i)
2008 Vulnerable C2a(i)
2006 Vulnerable
2004 Vulnerable
2000 Vulnerable
1996 Vulnerable
1994 Vulnerable
1988 Threatened
Species attributes

Migratory status not a migrant Forest dependency Does not normally occur in forest
Land mass type Land-mass type - continent
Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 1,980,000 medium
Number of locations -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 1500-7000 poor estimated 2000
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) 3.6 - - -

Population justification: This species is poorly known. It appears to be very rare to rare and very local throughout its range. Collar et al. (1992) described it as exceedingly rare. Given this, the total population is estimated to fall below 10,000 individuals, despite its large range. It is placed in the band 2,500-9,999 individuals, equating to 1,667-6,666 mature individuals, rounded here to 1,500-7,000 mature individuals. Further information is required to validate this however.

Trend justification: Trends have not been well documented, but the species appears to be declining for poorly understood reasons (B. Knapton in litt. 2003), being scarce in areas even in areas where it was formerly described as relatively numerous (e.g. Ridgely and Tudor 1994). In Ecuador, there has been an apparently precipitous drop in numbers (Ridgely and Greenfield 2001). The situation in Peru is similar (Schulenberg et al. 2007).


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Argentina N Extant Yes
Bolivia N Extant Yes
Chile N Extant Yes
Ecuador N Extant Yes
Peru N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Argentina Caspala y Santa Ana
Argentina Cerro Negro de San Antonio
Argentina Cuesta del Clavillo
Argentina El Infiernillo
Argentina Parque Nacional Campo de los Alisos
Argentina Parque Nacional Los Cardones
Argentina Parque Provincial Cumbres Calchaquíes
Argentina Parque Provincial La Florida
Argentina Parque Provincial Los Ñuñorcos y Reserva Natural Quebrada del Portugués
Argentina Reserva Provincial de Uso Múltiple Laguna Leandro
Argentina Sierra de Santa Victoria
Argentina Sierra de Zenta
Chile Monumento Natural Salar de Surire
Ecuador Parque Nacional Podocarpus
Peru Cotahuasi
Peru Parque Nacional Huascarán
Peru Reserva Nacional Salinas y Aguada Blanca
Peru Río Cajamarca

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Arable Land suitable resident
Artificial/Terrestrial Pastureland suitable resident
Artificial/Terrestrial Urban Areas suitable resident
Grassland Subtropical/Tropical High Altitude major resident
Shrubland Subtropical/Tropical High Altitude major resident
Altitude 2400 - 4300 m Occasional altitudinal limits (max) 5000 m

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Livestock farming & ranching Timing Scope Severity Impact
Ongoing Majority (50-90%) Unknown
Stresses
Ecosystem degradation, Ecosystem conversion
Invasive and other problematic species, genes & diseases Problematic native species/diseases Timing Scope Severity Impact
Ongoing Majority (50-90%) Unknown
Stresses
Competition

Recommended citation
BirdLife International (2019) Species factsheet: Agriornis albicauda. Downloaded from http://www.birdlife.org on 05/12/2019. Recommended citation for factsheets for more than one species: BirdLife International (2019) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 05/12/2019.