Data Zone
Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.
| Critically Endangered | Endangered | Vulnerable |
|---|---|---|
| - | - | - |
| Year | Category | Criteria |
|---|---|---|
| 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 | Medium |
| Land mass type | Average mass | - |
| Estimate | Data quality | |
|---|---|---|
| Extent of Occurrence breeding/resident (km2) | 18,700,000 | medium |
| Extent of Occurrence non-breeding (km2) | 18,600,000 | medium |
| Number of locations | - | |
| Severely Fragmented | - |
| Value | Data quality | Derivation | Year of estimate | |
|---|---|---|---|---|
| No. of mature individuals | 2000000 | poor | estimated | 2009 |
| Population trend | Decreasing | estimated | - | |
| 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 | - | - | - | |
| Generation length (yrs) | 5.4 | - | - | - |
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 | Occurrence status | Presence | Resident | Breeding | Non-breeding | Passage |
|---|---|---|---|---|---|---|
| Bermuda (to UK) | V | Extant | ||||
| Canada | N | Extant | Yes | |||
| Costa Rica | N | Extant | Yes | |||
| Guatemala | N | Extant | Yes | |||
| Mexico | N | Extant | ||||
| St Pierre and Miquelon (to France) | V | Extant | Yes | Yes | ||
| USA | N | Extant | Yes |
| Country/Territory | IBA Name |
|---|---|
| Canada | Tadoussac |
| Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
|---|---|---|---|
| Artificial/Terrestrial | Urban Areas | suitable | non-breeding |
| Desert | Temperate | suitable | breeding |
| Desert | Temperate | suitable | non-breeding |
| Forest | Boreal | suitable | breeding |
| Forest | Boreal | suitable | non-breeding |
| Forest | Subtropical/Tropical Moist Montane | suitable | non-breeding |
| Forest | Subtropical/Tropical Moist Montane | suitable | breeding |
| Forest | Subtropical/Tropical Swamp | suitable | non-breeding |
| Forest | Subtropical/Tropical Swamp | suitable | breeding |
| Altitude | 1900 - 3100 m | Occasional altitudinal limits |
Recommended citation
BirdLife International (2021) Species factsheet: Aegolius acadicus. Downloaded from
http://www.birdlife.org on 04/08/2021.
Recommended citation for factsheets for more than one species: BirdLife International (2021) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 04/08/2021.
