Species: Lasionycteris noctivagans
Silver-haired Bat
Species
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Encyclopedia of Puget Sound
Articles:
This article originally appeared in the State of Washington Bat Conservation Plan. Further information is available from the Washington Department of Fish and Wildlife.
The Washington Department of Fish and Wildlife recently released a Bat Conservation Plan for the 15 species of bats found in Washington State. All but four of these species occur within the greater Puget Sound watershed1, including:
Classification
Kingdom
Animalia
Phylum
Craniata
Class
Mammalia
Order
Chiroptera
Family
Vespertilionidae
Genus
Lasionycteris
NatureServe
Classification
Other Global Common Names
Un Murciélago - chauve-souris argentée
Informal Taxonomy
Animals, Vertebrates - Mammals - Bats
Formal Taxonomy
Animalia - Craniata - Mammalia - Chiroptera - Vespertilionidae - Lasionycteris - No subspecies are recognized.
Ecology and Life History
Short General Description
A medium-sized, silver-haired bat.
Migration
false - false - false - Generally migrates south for winter; see Cryan (2003) for monthly distribution based on museum records. Found only during spring and fall migration over major part of range. Migrates along southern shore of Lake Manitoba in waves in May and early June (Barclay et al. 1988).
Non-migrant
false
Locally Migrant
false
Food Comments
Forages for small to medium-size flying insects over small water bodies within forested areas.
Reproduction Comments
Breeds in late September. Fertilization is delayed until spring. Gestation lasts 50-60 days. Litter of 1-2 young is born in June-July, sometimes later in north. Sexually mature in first summer. Able to fly at about 3 weeks. Maternity colonies are small (Parsons et al. 1986).
Ecology Comments
Densities probably low. Usually roosts singly, but occasionally in groups of up to 3-6 (Barclay et al. 1988).
Length
11
Weight
15
Conservation Status
NatureServe Global Status Rank
G5
Global Status Last Reviewed
2008-01-04
Global Status Last Changed
1996-11-05
Other Status
LC - Least concern
Distribution
Conservation Status Map
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Global Range
H - >2,500,000 square km (greater than 1,000,000 square miles) - H - Range extends from southeastern Alaska and much of western Canada south of the Northwest Territories south to central California, northern Mexico, and east through Georgia (Yates et al. 1976, Hall 1981). The species is known also from Bermuda. It winters in the Pacific Northwest, in scattered areas of the southwestern United States, and at middle latitudes of the eastern United States approximately south of Michigan and east of the Mississippi River (Cryan 2003). Males seem to stay farther south in spring and summer than do females, except for populations in British Columbia that do not appear to migrate (Cryan 2003).
Global Range Code
H
Global Range Description
>2,500,000 square km (greater than 1,000,000 square miles)