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LC
Brown-headed Cowbird Molothrus ater

IUCN Red List history

Year Category
2012 Least Concern
2009 Least Concern
2008 Least Concern
2004 Least Concern
2000 Lower Risk/Least Concern
1994 Lower Risk/Least Concern
1988 Lower Risk/Least Concern

Species attributes

Migratory status full migrant Forest dependency Low
Land mass type   Average mass -

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 5,320,000 medium
Extent of Occurrence non-breeding (km2) 5,320,000 medium
Number of locations -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals poor Estimated 2009
Population trend Decreasing -
Number of subpopulations - - -
Largest subpopulation - - -
Generation length (yrs) 4.6 - - -
Trend justification: This species has undergone a small or statistically insignificant decrease over the last 40 years in North America (data from Breeding Bird Survey and/or Christmas Bird Count: Butcher and Niven 2007).

Country/Territory distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage Resident
Bahamas Native Extant        
Belize Vagrant Extant        
Canada Native Extant   Yes Yes  
Cuba Native Extant        
Mexico Native Extant        
St Pierre and Miquelon (to France) Native Extant   Yes Yes  
Turks and Caicos Islands (to UK) Native Extant        
United Kingdom Vagrant Extant        
USA Native Extant Yes      

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Arable Land marginal non-breeding
Artificial/Terrestrial Pastureland suitable non-breeding
Forest Subtropical/Tropical Dry suitable breeding
Forest Subtropical/Tropical Dry suitable non-breeding
Forest Temperate suitable breeding
Forest Temperate suitable non-breeding
Grassland Subtropical/Tropical Dry suitable breeding
Grassland Subtropical/Tropical Dry suitable non-breeding
Grassland Temperate suitable breeding
Grassland Temperate suitable non-breeding
Altitude 0 - 2000 m Occasional altitudinal limits  

Utilisation

Purpose Primary form used Life stage used Source Scale Level Timing
Pets Whole Adults and juveniles Wild International Non-trivial Recent

Recommended citation
BirdLife International (2014) Species factsheet: Molothrus ater. Downloaded from http://www.birdlife.org on 28/11/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 28/11/2014.

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 Least Concern
Family Icteridae (New World blackbirds)
Species name author (Boddaert, 1783)
Population size mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 5,320,000 km2
Country endemic? No
Links to further information
- Summary information on this species