Long-eared Owl

Asio otus

General Status Rank: 
Undetermined
ELCODE: 
ABNSB13010
Common Name: 
Long-eared Owl
Scientific Name: 
Asio otus
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Taxonomy
Group: 
Bird
Kingdom: 
Animalia
Phylum: 
Chordata
Class: 
Aves
Order: 
Strigiformes
Family: 
Strigidae
References: 
B004
General Biology

Female Age at Maturity

Males banded as nestlings bred successfully as yearlings in Idaho (Marks 1985) and Montana (DWH). Females probably breed at 1 yr, but data from banded birds lacking.
References: 
B143

Longevity

record is 9 yr in NA and 27 yr in Europe
References: 
B143
Reproduction Frequency Per Year: 
1
Habitat
dense coniferous and mixed wood forests
References: 
B004
H126
Distribution

Ecozones

Taiga Plains, Boreal Plains
References: 
B004

Distribution

0.097; Rare migrant and breeder. There are about ten records from the Territory, the majority are from Fort Simpson, but there are also reports from Fort Liard, Fort Providence, Yellowknife and the Great Bear Lake area. The lack of records may be a result of lack of observers in the Territory and the secretive nature of this species. There are old historical records of eggs collected at Fort Simpson and Fort Providence, and one recent confirmed breeding in Fort Simpson.(NWT Bird checklist project)
Score: 
F
References: 
B004
Winter Distribution Description: 
withdraws from northernmost range

Area of Occupancy

Score: 
-
References: 
W027
Population

Population Size

Unknown
References: 
H126

Density

roost gregareously
Trends

Trends

Trend data very poor, as there may be nomadism related to changes in food supply (Marks et al. 1994), and Christmas Bird Count (CBC) results not up to date in any case.
References: 
W027
Threats

Threats

habitat loss limited in NWT
References: 
B004
H126

Intrinsic Vulnerability

Forest management resulting in less snags, forestry; threats limited in NWT
Score: 
-
References: 
B004
H126
General Status Rank
Rank: 
Undetermined
Status Rank Description: 
Unknown numbers, unknown trends in Canada and north;exact distribution is unknown in the NWT; threats appear limited in NWT
S Rank: 
SU
Decision Process Description: 
Drafted by Suzanne Carriere based on printed references. Reviewed in 2005 by S Carriere, no change in status; Reviewed in 2010;no change; Reviewed in 2015, no change; Reviewed in 2020, no change
Last Updated: 
June 30, 2020

References

Age Of Maturity

  • Marks, J. S., D. L. Evans, and D. W. Holt. (1994) Long-eared Owl (Asio otus). Philadelphia: The y of Natural Sciences; Washington, D.C.: The American Ornithologists’ Union In The Birds of North America, No. 133 (A. Poole and F. Gill, Eds.). - B143 Return

Area of Occupancy

  • Dunn, E.H (2005) National action needs for Canadian Landbird Conservation,. Canadian Wildlife Service Landbird Committee, Version 1. [http://www.cws-scf.ec.gc.ca/birds/action/index_e.cfm]. - W027 Return

Ecozones

  • Godfrey WE (1986) The Birds of Canada. National Museums of Canada Revised Edition RWED Library Call #QL685.G6 - B004 Return

Habitat

  • Godfrey WE (1986) The Birds of Canada. National Museums of Canada Revised Edition RWED Library Call #QL685.G6 - B004 Return
  • Carrière, S. (2000) Pers. communication. Ecosystem Management Biologist; RWED - H126 Return

Intrinsic Vulnerability

  • Godfrey WE (1986) The Birds of Canada. National Museums of Canada Revised Edition RWED Library Call #QL685.G6 - B004 Return
  • Carrière, S. (2000) Pers. communication. Ecosystem Management Biologist; RWED - H126 Return

Longevity

  • Marks, J. S., D. L. Evans, and D. W. Holt. (1994) Long-eared Owl (Asio otus). Philadelphia: The y of Natural Sciences; Washington, D.C.: The American Ornithologists’ Union In The Birds of North America, No. 133 (A. Poole and F. Gill, Eds.). - B143 Return

NWT Known Subspecies

Godfrey WE (1986) The Birds of Canada. National Museums of Canada Revised Edition RWED Library Call #QL685.G6 - B004 Return

Population Size

Carrière, S. (2000) Pers. communication. Ecosystem Management Biologist; RWED - H126 Return

Range Extent

  • Godfrey WE (1986) The Birds of Canada. National Museums of Canada Revised Edition RWED Library Call #QL685.G6 - B004 Return

Short Term Trends

  • Dunn, E.H (2005) National action needs for Canadian Landbird Conservation,. Canadian Wildlife Service Landbird Committee, Version 1. [http://www.cws-scf.ec.gc.ca/birds/action/index_e.cfm]. - W027 Return

Taxonomy

  • Godfrey WE (1986) The Birds of Canada. National Museums of Canada Revised Edition RWED Library Call #QL685.G6 - B004 Return

Threats

  • Godfrey WE (1986) The Birds of Canada. National Museums of Canada Revised Edition RWED Library Call #QL685.G6 - B004 Return
  • Carrière, S. (2000) Pers. communication. Ecosystem Management Biologist; RWED - H126 Return