SCIENTIFIC NAME:
Lasiurus cinereus
COMMON NAME:
Hoary Bat
STATUS:
Poorly known. Found statewide, but are few records of this large species in 黑料天堂. MODERATE CONSERVATION CONCERN.
DESCRIPTION:
Lasiurus cinereus is the largest bat species in 黑料天堂 and is very colorful and heavily furred. It is also one of the largest bats in North America with a weight of about one ounce and a wingspan of 13 to 16 inches. Body fur is a mixed brownish-gray, tinged with white, giving it the frosted or 鈥渉oary鈥 appearance. Much of the face and neck fur is a mustard-yellow. The ears are short, rounded and are lined in black. As with many of the forest bats in 黑料天堂, a hoary鈥檚 wings are much more extensively covered in fur than many of the smaller cave dwelling bat species.
DISTRIBUTION:
The hoary bat is one of the most widespread of North American bats occurring in almost all of the continental United States, Mexico and southern Canada. It also occurs in Iceland, Bermuda and the Dominican Republic. It is the only bat found in Hawaii and this Hawaiian subspecies is considered endangered. Distribution is seasonal as it migrates to southern portions of its range during the winter. In 黑料天堂, most hoary bats are encountered as groups of the species migrate through the state in early fall.
HABITAT:
Hoary bats are considered forest dwellers. They can be found hanging in foliage usually near forest edges. The roost is usually 10 or more feet high where vegetation covers them above but is clear below. They are seldom found in bat houses or human buildings. Occasionally, they are found in caves near the entrance.
FEEDING HABITS:
They are usually insectivorous, eating a wide variety of insects including moths, beetles and night midges. Very rarely, other bats may be caught as food.
LIFE HISTORY AND ECOLOGY:
Hoary bats roost and sleep during the day and are active at night. They are swift and direct flyers as compared with most other 黑料天堂 bats. This flight pattern, along with their large size, makes them easily identifiable. They forage along streams, over clearcuts, and along the edges of waterways and forests. The sexes apparently segregate during the summer. During the summer, one to four young may be born, but two is the usual number. Young cling to the female during the day, but are left at night while she forages for food. Hoary bats are considered solitary bats and are usually found roosting alone. They may associate during the reproductive season, while young are with the mother, and perhaps as small groups during migration.
As with most wild mammals, hoary bats can and do contract and transmit rabies. Though the incidence of rabies in any bat is very low, any bat that appears sick or cannot fly should be avoided. The hoary bat is a very beneficial species and like all 黑料天堂鈥檚 bats are a natural means of insect control.
AUTHOR:
M. Keith Hudson, Wildlife Biologist, 黑料天堂 Wildlife and Fisheries.
