Data Zone
Taxonomic note
Asemospiza obscura (del Hoyo and Collar 2016) was previously placed in the genus Tiaris and listed as T. obscurus following SACC (2005 & updates); Sibley & Monroe (1990, 1993); Stotz et al. (1996).
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. 2005 and updates. A classification of the bird species of South America. Available at: https://www.museum.lsu.edu/~Remsen/SACCBaseline.htm.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 2024 | Least Concern | |
| 2016 | Least Concern | |
| 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 |
| Migratory status | not a migrant | Forest dependency | low |
| Land-mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 4,500,000 km2 | medium |
| Extent of Occurrence (non-breeding) | 6,410,000 km2 | medium |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | unknown | - | - | - |
| Population trend | increasing | - | suspected | - |
| Generation length | 2.39 years | - | - | - |
Population justification: The global population size has not been quantified, but this species is described as 'uncommon and patchily distributed' (Stotz et al. 1996). The population is suspected to be increasing as ongoing habitat degradation is creating new areas of suitable habitat.
Trend justification: The population is suspected to be increasing as ongoing habitat degradation is creating new areas of suitable habitat.
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Argentina | extant | native | yes | |||
| Bolivia | extant | native | yes | |||
| Brazil | extant | native | yes | |||
| Colombia | extant | native | yes | |||
| Ecuador | extant | native | yes | |||
| Paraguay | extant | native | yes | |||
| Peru | extant | native | yes | |||
| Venezuela | extant | native | yes |
| Country/Territory | IBA Name |
|---|
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Artificial/Terrestrial | Rural Gardens | suitable | resident |
| Artificial/Terrestrial | Subtropical/Tropical Heavily Degraded Former Forest | suitable | resident |
| Forest | Subtropical/Tropical Moist Lowland | suitable | resident |
| Forest | Subtropical/Tropical Moist Montane | suitable | resident |
| Shrubland | Subtropical/Tropical High Altitude | suitable | resident |
| Shrubland | Subtropical/Tropical Moist | suitable | resident |
| Altitude | 0 - 2430 m | Occasional altitudinal limits |
Recommended citation
BirdLife International (2024) Species factsheet: Dull-colored Grassquit Asemospiza obscura. Downloaded from
https://datazone.birdlife.org/species/factsheet/dull-colored-grassquit-asemospiza-obscura on 18/12/2024.
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 18/12/2024.