Data Zone
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.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 2016 | Least Concern | |
| 2012 | Not Recognised | |
| 2008 | Not Recognised | |
| 2005 | Not Recognised | |
| 2004 | Not Recognised | |
| 2000 | Not Recognised | |
| 1994 | Not Recognised | |
| 1988 | Not Recognised |
| Migratory status | full migrant | Forest dependency | low |
| Land-mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 6,260,000 km2 | medium |
| Extent of Occurrence (non-breeding) | 4,660,000 km2 | medium |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | unknown | poor | estimated | 2009 |
| Population trend | stable | - | estimated | - |
| Generation length | 4.6 years | - | - | - |
Trend justification: This species has had stable population trends over the last 40 years in North America (data from Breeding Bird Survey and/or Christmas Bird Count: Butcher and Niven 2007). Note, however, that these surveys cover less than 50% of the species's range.
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Belize | extant | native | yes | |||
| Costa Rica | extant | native | yes | |||
| El Salvador | extant | native | yes | |||
| Guatemala | extant | native | yes | |||
| Honduras | extant | native | yes | |||
| Mexico | extant | native | yes | |||
| Nicaragua | extant | native | yes | |||
| Panama | extant | native | yes | |||
| USA | extant | native | yes |
| Country/Territory | IBA Name |
|---|
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Artificial/Terrestrial | Arable Land | suitable | non-breeding |
| Artificial/Terrestrial | Pastureland | suitable | non-breeding |
| Artificial/Terrestrial | Rural Gardens | suitable | non-breeding |
| Forest | Subtropical/Tropical Dry | suitable | breeding |
| Forest | Subtropical/Tropical Moist Lowland | suitable | breeding |
| Altitude | 0 - 2200 m | Occasional altitudinal limits |
| Purpose | Scale |
|---|---|
| Pets/display animals, horticulture | international |
Recommended citation
BirdLife International (2024) Species factsheet: Bronzed Cowbird Molothrus aeneus. Downloaded from
https://datazone.birdlife.org/species/factsheet/bronzed-cowbird-molothrus-aeneus on 22/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 22/12/2024.