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Hoary Bat

Aeorestes cinereus

General Status Rank:

Undetermined

ELCODE:

AMACC05030

Common Name:

Hoary Bat

Scientific Name:

Aeorestes cinereus

Synonyms:

Lasiurus cinereus

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Taxonomy

Group:

Mammal (Terrestrial Mammal)

Kingdom:

Animalia

Phylum:

Chordata

Class:

Mammalia

Order:

Chiroptera

Family:

Vespertilionidae

References:

Habitat

Boreal and northern coniferous forest - thus Nunavut specimen uncharacteristic of species.

References:

Distribution

Ecozones

Taiga Plains, Taiga Shield, Boreal Plains

References:

Distribution

Nahanni National Park Reserve, Fort Simpson, Yellowknife, and 7 locations near Fort Smith. There was one hoary bat sighting reported at Fort Resolution (?). Nunavut record verified with a specimen (BAT1). Occurring in about 5-10% of NWT according to NatureServe.

Score:

FG =

References:

Number of Occurrences

Salt River area and up to Little Buffalo Falls (based on bat detector filters - Cori Lausen). There are confirmed NWT records of hoary bats (records are reliably differentiated acoustic recordings 2006-2011) from Nahanni National Park Reserve, Fort Simpson, Yellowknife, and 7 locations near Fort Smith. There was one hoary bat sighting reported at Fort Resolution in 1907 (Lausen et al., 2014; Wilson et al., 2014). These records suggest the hoary bat occurs regularly in the NWT in summer (Wilson et al., 2014). Hoary bats are well distributed in southern parts of Alaska, Yukon, and NWT (Jung et al., 2014).

References:

Historical Distribution

Fort Resolution

References:

Area of Occupancy

Migratory

Score:

-

Population

Population Size

Very small; one sight record for NWT and one specimen for Nunavut; ecolocations in South Slave region.

References:

Threats

Intrinsic Vulnerability

None known but this bat roosts in foliage 3-12 m above ground and may be affected by forest habitat loss; threats to habitat in NWT are probably limited but cannot discount possible negative effects of forest habitat loss.

Score:

-

General Status Rank

Rank:

Undetermined

Status Rank Description:

Because white-nose syndrome afflicts bats while hibernating and this species doesn’t hibernate in the NWT, they are less likely to be affected. However, mortality from wind turbines along migration routes is a threat that should be mentioned. J. Wilson suggested leaving this species at ‘undetermined’ status rank.

S Rank:

SU

Decision Process Description:

Drafted using information and comments from M. Fournier. Reviewed in 2004, no changes in status. Reviewed in 2010, no change. Reviewed in 2015, no change. Reviewed in 2020, no change.

Last Updated:

February 15, 2024

References

Ecozones

Banfield AWF (1974) The Mammals of Canada. University of Toronto Press RWED Library Call #QL721.B3 - B001 Return
Fournier M.A. (2000) Bats in the Northwest Territories and Nunavut: a review. Undetermined In Preparation - BAT1 Return
van Zyll de Jong, C.G. (1985) Handbook of Canadian Mammals - Bats. National Museums of Canada - National Museum of Natural Sciences Volume 2 - BAT2 Return

Habitat

Banfield AWF (1974) The Mammals of Canada. University of Toronto Press RWED Library Call #QL721.B3 - B001 Return
Fournier M.A. (2000) Bats in the Northwest Territories and Nunavut: a review. Undetermined In Preparation - BAT1 Return
van Zyll de Jong, C.G. (1985) Handbook of Canadian Mammals - Bats. National Museums of Canada - National Museum of Natural Sciences Volume 2 - BAT2 Return

Historical Distribution

Fournier M.A. (2000) Bats in the Northwest Territories and Nunavut: a review. Undetermined In Preparation - BAT1 Return
van Zyll de Jong, C.G. (1985) Handbook of Canadian Mammals - Bats. National Museums of Canada - National Museum of Natural Sciences Volume 2 - BAT2 Return

NWT Known Subspecies

Fournier M.A. (2000) Bats in the Northwest Territories and Nunavut: a review. Undetermined In Preparation - BAT1 Return

,

van Zyll de Jong, C.G. (1985) Handbook of Canadian Mammals - Bats. National Museums of Canada - National Museum of Natural Sciences Volume 2 - BAT2 Return

Number of Occurrences

Fournier M.A. (2000) Bats in the Northwest Territories and Nunavut: a review. Undetermined In Preparation - BAT1 Return
van Zyll de Jong, C.G. (1985) Handbook of Canadian Mammals - Bats. National Museums of Canada - National Museum of Natural Sciences Volume 2 - BAT2 Return
Reimer, Jesika (2012) E-mail reply to "Re: Draft NWT bat range maps - for review" to Wilson Joanna (19/01/2012). Jesika Reimer [jesika.reimer@gmail.com] printed in binder - H260 Return
Wilson, JM, Reimer, JP, Allaire, D. and Lausen, CL (2014) Northwestern Naturalist 95:197-218 - A398 Return
LAUSEN CL, WAITHAKA J, TATE D. (2014) Northwestern Naturalist 95:186–196. - A401 Return
Wilson J. (2015) e-mail sent to S Carriere 21/04/2015 e-copy - H317 Return
Jung, TS, KM Blejwas, CL Lausen, JM Wilson and LE Olson. (2014) Northwestern Naturalist 95(3): 318-330. - A402 Return

Population Size

Fournier M.A. (2000) Bats in the Northwest Territories and Nunavut: a review. Undetermined In Preparation - BAT1 Return

,

van Zyll de Jong, C.G. (1985) Handbook of Canadian Mammals - Bats. National Museums of Canada - National Museum of Natural Sciences Volume 2 - BAT2 Return

,

Reimer, Jesika (2012) E-mail reply to "Re: Draft NWT bat range maps - for review" to Wilson Joanna (19/01/2012). Jesika Reimer [jesika.reimer@gmail.com] printed in binder - H260 Return

Range Extent

Banfield AWF (1974) The Mammals of Canada. University of Toronto Press RWED Library Call #QL721.B3 - B001 Return
Fournier M.A. (2000) Bats in the Northwest Territories and Nunavut: a review. Undetermined In Preparation - BAT1 Return
Nature Serve: An online encyclopedia of life (web application) (2004) Version 4.0 (01 July 2004). Arlington Virginia USA. Association for Biodiversity Information.. http://www.natureserve.org/explorer/servlet/NatureServe?init=Species - W020 Return

Taxonomy

Banfield AWF (1974) The Mammals of Canada. University of Toronto Press RWED Library Call #QL721.B3 - B001 Return