Hoary bat
Encyclopedia
The hoary bat is a species of bat
in the vesper bat
family, Vespertilionidae. It occurs throughout most of North America
and much of South America
, with disjunct populations
in the Galapagos
and Hawaiian Islands
The hoary bat averages 13 to 14.5 cm (5 to 5.7 in) long with a 40 cm (15.7 in) wingspan and a weight of 26 g (0.9 oz). It is the largest bat normally found in Canada
. Its coat
is of a dark brown colour and there is silver frosting on its back. With the major exception of the underside of the wing, most of the bat is covered in fur.
The bat normally roosts alone on tree
s, hidden among foliage, but on occasion has been seen in cave
s with other bats. It prefers woodland, mainly coniferous forests, but hunts over open areas or lake
s. It hunts alone and its main food source is moth
s
The reproductive cycle of the hoary bat is not yet fully documented, but it is thought that they mate in August with birth occurring in June of the following year. It is thought that the gestation period
is only 4 days and that mammalian embryonic diapause (delayed implantation) may play a role. Litter
s range from 1-2 pups and the young spend about one month with the mother before being able to fend for themselves.
The bat is migratory and may travel from Canada as far south as the Southern United States
or Bermuda
. It will occasionally roost inside shipping crates and this may account for reports of them being observed above the Arctic Circle
.
Like other members of the family Vespertilionidae, the hoary bat has a unique bony tail that they use as a sort of "feeler".
Bat
Bats are mammals of the order Chiroptera "hand" and pteron "wing") whose forelimbs form webbed wings, making them the only mammals naturally capable of true and sustained flight. By contrast, other mammals said to fly, such as flying squirrels, gliding possums, and colugos, glide rather than fly,...
in the vesper bat
Vesper bat
Vesper bats , also known as Evening bats or Common bats, are the largest and best-known family of bats. They belong to the suborder Microchiroptera . There are over three hundred species distributed all over the world, on every continent except Antarctica...
family, Vespertilionidae. It occurs throughout most of North America
North America
North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...
and much of South America
South America
South America is a continent situated in the Western Hemisphere, mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere. The continent is also considered a subcontinent of the Americas. It is bordered on the west by the Pacific Ocean and on the north and east...
, with disjunct populations
Disjunct distribution
In biology, a taxon with a disjunct distribution is one that has two or more groups that are related but widely separated from each other geographically...
in the Galapagos
Galápagos Islands
The Galápagos Islands are an archipelago of volcanic islands distributed around the equator in the Pacific Ocean, west of continental Ecuador, of which they are a part.The Galápagos Islands and its surrounding waters form an Ecuadorian province, a national park, and a...
and Hawaiian Islands
Hawaiian Hoary bat
The Hawaiian Hoary bat or Ōpeapea is a subspecies of the Hoary bat that is endemic to the Hawaiian Islands...
The hoary bat averages 13 to 14.5 cm (5 to 5.7 in) long with a 40 cm (15.7 in) wingspan and a weight of 26 g (0.9 oz). It is the largest bat normally found in Canada
Canada
Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...
. Its coat
Fur
Fur is a synonym for hair, used more in reference to non-human animals, usually mammals; particularly those with extensives body hair coverage. The term is sometimes used to refer to the body hair of an animal as a complete coat, also known as the "pelage". Fur is also used to refer to animal...
is of a dark brown colour and there is silver frosting on its back. With the major exception of the underside of the wing, most of the bat is covered in fur.
The bat normally roosts alone on tree
Tree
A tree is a perennial woody plant. It is most often defined as a woody plant that has many secondary branches supported clear of the ground on a single main stem or trunk with clear apical dominance. A minimum height specification at maturity is cited by some authors, varying from 3 m to...
s, hidden among foliage, but on occasion has been seen in cave
Cave
A cave or cavern is a natural underground space large enough for a human to enter. The term applies to natural cavities some part of which is in total darkness. The word cave also includes smaller spaces like rock shelters, sea caves, and grottos.Speleology is the science of exploration and study...
s with other bats. It prefers woodland, mainly coniferous forests, but hunts over open areas or lake
Lake
A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds. Lakes can be contrasted with rivers or streams,...
s. It hunts alone and its main food source is moth
Moth
A moth is an insect closely related to the butterfly, both being of the order Lepidoptera. Moths form the majority of this order; there are thought to be 150,000 to 250,000 different species of moth , with thousands of species yet to be described...
s
The reproductive cycle of the hoary bat is not yet fully documented, but it is thought that they mate in August with birth occurring in June of the following year. It is thought that the gestation period
Gestation period
For mammals the gestation period is the time in which a fetus develops, beginning with fertilization and ending at birth. The duration of this period varies between species.-Duration:...
is only 4 days and that mammalian embryonic diapause (delayed implantation) may play a role. Litter
Litter (animal)
A litter is the offspring at one birth of animals from the same mother and usually from one set of parents. The word is most often used for the offspring of mammals, but can be used for any animal that gives birth to multiple young. In comparison, a group of eggs and the offspring that hatch from...
s range from 1-2 pups and the young spend about one month with the mother before being able to fend for themselves.
The bat is migratory and may travel from Canada as far south as the Southern United States
Southern United States
The Southern United States—commonly referred to as the American South, Dixie, or simply the South—constitutes a large distinctive area in the southeastern and south-central United States...
or Bermuda
Bermuda
Bermuda is a British overseas territory in the North Atlantic Ocean. Located off the east coast of the United States, its nearest landmass is Cape Hatteras, North Carolina, about to the west-northwest. It is about south of Halifax, Nova Scotia, Canada, and northeast of Miami, Florida...
. It will occasionally roost inside shipping crates and this may account for reports of them being observed above the Arctic Circle
Arctic Circle
The Arctic Circle is one of the five major circles of latitude that mark maps of the Earth. For Epoch 2011, it is the parallel of latitude that runs north of the Equator....
.
Like other members of the family Vespertilionidae, the hoary bat has a unique bony tail that they use as a sort of "feeler".