email a friend
printable version
VU
Cock-tailed Tyrant Alectrurus tricolor

IUCN Red List Criteria

Critically Endangered  
Endangered  
Vulnerable A2c+3c+4c 

IUCN Red List history

Year Category
2012 Vulnerable
2011 Vulnerable
2008 Vulnerable
2004 Vulnerable
2000 Vulnerable
1994 Lower Risk/Near Threatened
1988 Near Threatened

Species attributes

Migratory status full migrant Forest dependency Does not normally occur in forest
Land mass type continent
Average mass -

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 626,000 medium
Number of locations 11-100 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 6000-15000 poor Estimated 2000
Population trend Decreasing poor -
Number of subpopulations 2-100 - - -
Largest subpopulation 251-1000 - - -
Generation length (yrs) 3.6 - - -
Population justification: The population is estimated to number 10,000-19,999 individuals based on an assessment of known records, descriptions of abundance and range size. This is consistent with recorded population density estimates for congeners or close relatives with a similar body size (e.g. the lower end of such estimates is 1 / km2) and the fact that only a proportion of the estimated Extent of Occurrence is likely to be occupied.
Trend justification: This species's population size is suspected to be declining rapidly in line with rates of habitat loss within its range.

Country/Territory distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage
Argentina Native Extant Yes    
Bolivia Native Extant Yes    
Brazil Native Extant Yes    
Paraguay Native Extant Yes    

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
Bolivia Este de Río Mamoré site factsheet
Bolivia Loreto site factsheet
Bolivia Oeste de Río Mamoré site factsheet
Bolivia Reserva de Inmovilización Iténez site factsheet
Brazil Campos Gerais do Paraná site factsheet
Brazil Cerrados ao Sul de Brasília site factsheet
Brazil Estação Ecológica de Águas Emendadas site factsheet
Brazil Itirapina site factsheet
Brazil Parque Nacional da Chapada dos Veadeiros e Adjacências site factsheet
Brazil Parque Nacional das Emas site factsheet
Brazil Parque Nacional de Brasília site factsheet
Brazil Parque Nacional de Ilha Grande site factsheet
Brazil Rios Negro e Aquidauana site factsheet
Brazil Serra da Canastra site factsheet
Paraguay Arroyo Tagatiya site factsheet
Paraguay Cerrado de Laguna Blanca site factsheet
Paraguay Cerrados de Concepción site factsheet
Paraguay Estancia La Graciela site factsheet
Paraguay Estancia Sombrero site factsheet
Paraguay La Yegreña site factsheet
Paraguay Morombi site factsheet
Paraguay Parque Nacional San Rafael site factsheet
Paraguay Tapyta site factsheet

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Grassland Subtropical/Tropical Dry major breeding
Grassland Subtropical/Tropical Dry major non-breeding
Grassland Subtropical/Tropical Seasonally Wet/Flooded major breeding
Grassland Subtropical/Tropical Seasonally Wet/Flooded major non-breeding
Savanna Dry major breeding
Savanna Dry major non-breeding
Altitude 0 - 1460 m Occasional altitudinal limits  

Threats & impact

Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops / Agro-industry farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Rapid Declines Medium Impact:
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching / Agro-industry grazing, ranching or farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Decline Medium Impact:
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Livestock farming & ranching / Small-holder grazing, ranching or farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Decline Medium Impact:
Stresses
Ecosystem degradation, Ecosystem conversion
Agriculture & aquaculture Wood & pulp plantations / Agro-industry plantations Timing Scope Severity Impact
Ongoing Majority (50-90%) Rapid Declines Medium Impact:
Stresses
Ecosystem degradation, Ecosystem conversion
Energy production & mining Mining & quarrying Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases / Jaragua Grass (hyparrhenia rufa) Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Ecosystem degradation
Natural system modifications Fire & fire suppression / Increase in fire frequency/intensity Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Decline Medium Impact:
Stresses
Ecosystem degradation

Recommended citation
BirdLife International (2014) Species factsheet: Alectrurus tricolor. Downloaded from http://www.birdlife.org on 22/07/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 22/07/2014.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Key facts
Current IUCN Red List category Vulnerable
Family Tyrannidae (Tyrant-flycatchers)
Species name author (Vieillot, 1816)
Population size 6000-15000 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 626,000 km2
Country endemic? No
Links to further information
- Summary information on this species