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 |
---|---|---|
2021 | Least Concern | |
2018 | 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 | full migrant | Forest dependency | Does not normally occur in forest |
Land mass type | Average mass | 14 g |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence breeding/resident (km2) | 3,960,000 | medium |
Extent of Occurrence non-breeding (km2) | 2,500,000 | medium |
Number of locations | - | |
Severely Fragmented | - |
Value | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
No. of mature individuals | 62000000 | poor | inferred | 2019 |
Population trend | Decreasing | inferred | - | |
Decline (3 years/1 generation past) | - | - | - | |
Decline (5 years/1 generation past) | - | - | - | |
Decline (10 years/1 generation past) | - | - | - | |
Decline (10 years/3 generation future) | - | - | - | |
Decline (10 years/3 generation past and future) | - | - | - | |
Number of subpopulations | - | - | - | |
Percentage in largest subpopulation | - | - | - |
Population justification: The global population is inferred to number 62 million mature individuals (Partners in Flight 2019).
Trend justification: The species has been undergoing a moderate decline at an average rate of 1.1% between 1970 and 2017, and a relatively short future half-life of 61 years is predicted (Partners in Flight 2019). Short-term trends however suggest that the population in North America showed fluctuations, but has been overall stable over the past ten years (Pardieck et al. 2018).
Country/Territory | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
---|---|---|---|---|---|---|
Canada | V | Extant | Yes | |||
Mexico | N | Extant | Yes | Yes | Yes | |
USA | N | Extant | Yes | Yes |
Country/Territory | IBA Name |
---|---|
Mexico | Archipiélago San José |
Mexico | Archipiélago Loreto |
Mexico | Isla San Marcos |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Desert | Hot | suitable | non-breeding |
Desert | Hot | suitable | breeding |
Shrubland | Subtropical/Tropical Dry | major | non-breeding |
Shrubland | Subtropical/Tropical Dry | major | breeding |
Altitude | 0 - 2200 m | Occasional altitudinal limits |
Recommended citation
BirdLife International (2023) Species factsheet: Amphispiza bilineata. Downloaded from
http://www.birdlife.org on 04/02/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 04/02/2023.