Data Zone
Taxonomic note
Passerella arborea (del Hoyo and Collar 2016) was previously placed in the genus Spizella following AOU (1998 & supplements); Sibley & Monroe (1990, 1993).
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 | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence (breeding/resident) | 8,260,000 km2 | medium |
| Extent of Occurrence (non-breeding) | 8,240,000 km2 | medium |
| Severely fragmented? | no | - |
| Estimate | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| Population size | 26000000 mature individuals | poor | estimated | 2019 |
| Population trend | decreasing | - | inferred | - |
| Generation length | 2.27 years | - | - | - |
Population justification: The global population is estimated to number 26 million mature individuals (Partners in Flight 2019).
Trend justification: The species has been undergoing a large, significant decline at an average rate of 1.8% per year between 1970 and 2014 (Partners in Flight 2019). Trends vary locally however, with populations in the south of the range declining and populations in the north increasing (Meehan et al. 2018).
| Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
|---|---|---|---|---|---|---|
| Canada | extant | native | yes | yes | yes | |
| Russia | extant | vagrant | yes | |||
| Russia (Asian) | extant | vagrant | yes | |||
| St Pierre and Miquelon (to France) | extant | vagrant | yes | |||
| USA | extant | native | yes | yes |
| Country/Territory | IBA Name |
|---|
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Artificial/Terrestrial | Pastureland | suitable | non-breeding |
| Artificial/Terrestrial | Rural Gardens | suitable | non-breeding |
| Grassland | Temperate | suitable | non-breeding |
| Grassland | Temperate | suitable | breeding |
| Shrubland | Boreal | suitable | breeding |
| Shrubland | Temperate | suitable | breeding |
| Wetlands (inland) | Bogs, Marshes, Swamps, Fens, Peatlands | suitable | non-breeding |
| Wetlands (inland) | Bogs, Marshes, Swamps, Fens, Peatlands | suitable | breeding |
| Altitude | Occasional altitudinal limits |
| Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Climate change & severe weather | Habitat shifting & alteration | Timing | Scope | Severity | Impact | ||||
| Future | Whole (>90%) | Unknown | Unknown | ||||||
|
|||||||||
| Purpose | Scale |
|---|---|
| Pets/display animals, horticulture | international |
Recommended citation
BirdLife International (2025) Species factsheet: American Tree Sparrow Passerella arborea. Downloaded from
https://datazone.birdlife.org/species/factsheet/american-tree-sparrow-passerella-arborea on 05/01/2025.
Recommended citation for factsheets for more than one species: BirdLife International (2025) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 05/01/2025.