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There are eighteen indigenous species of bats in Canada, which are found in many parts of the country. They are insectivores, and are prey to falcons, hawks, owls, snakes, cats, and raccoons.〔Health Canada〕〔Ministry of Natural Resources: Bat Ecology〕 ==Species== The little brown bat is the most common and widely distributed of Canada's bat species,〔Baily: 1997. Page 3〕 more prevalent in Eastern Canada than in Western Canada or Northern Canada.〔Bernhardt: Little Brown Bat〕 The nocturnal bat roosts in dark places during the day, and preys on insects at night.〔Bernhardt: Little Brown Bat〕 Their echolocation calls are emitted 20 times per second, increasing to 200 times per second while chasing prey.〔Smithsonian: Little Brown Bat〕 The habitat range of the big brown bat is in the southern parts of Quebec, Ontario, Manitoba, Saskatchewan, and British Columbia, and throughout Alberta.〔Bernhardt: Big Brown Bat〕 Males are solitary, whereas females "gather in maternity colonies in the spring and summer", consisting of up to 75 adults with their offspring.〔Smithsonian: Big Brown Bat〕 They forage at night on dry, warm evenings, catching and eating flying insects in the air.〔 They hibernate in the winter, migrating short distances to find an appropriate roost, such as mines and caves.〔 The largest bat in Canada is the hoary bat,〔 which inhabits all of Alberta, southern British Columbia, the southern half of Manitoba and Saskatchewan, most of Ontario, New Brunswick, and Nova Scotia, and the southern parts of Quebec.〔Bernhardt: Hoary Bat〕 The solitary bat has a coat of grey fur with white tipped hairs, giving it a "frosted" or "hoary" appearance.〔Smithsonian: Hoary Bat〕 They roost in trees, and prey on large insects such as wasps, dragonflies, beetles, and moths.〔 Northern long-eared myotis bats are found throughout Eastern Canada, southern Manitoba, northern Alberta, and parts of British Columbia, Saskatchewan, the Northwest Territories, and Yukon.〔Smithsonian: Northern Long-eared Myotis〕 It hibernates in caves and mines, and perches to eat insect prey.〔〔 Sometimes observed in British Columbia, the solitary red bat is generally found throughout the southern parts of Canada from Alberta to Nova Scotia.〔Bernhardt: Red Bat〕 The slow, graceful flying bat migrates south in groups in the autumn and winter.〔〔Smithsonian: Red Bat〕 It preys on flying insects, and roosts in trees and shrubs.〔〔〔 The reclusive silver-haired bat〔Ministry of Natural Resources〕 resembles the hoary bat,〔Smithsonian: Silver-haired Bat〕 but has a "deep chocolate brown color with a white frosting on its back and abdomen".〔Bernhardt: Silver-Haired Bat〕 Its habitat is primarily forested areas in the southern parts of Canada, where it is common and roosts alone in logs or under bark,〔 but it is also found in grassland.〔 Groups congregate for southward migration in the autumn and winter,〔 though some individuals may undergo torpor and hibernate instead.〔 Its preferred food is small, flying insects, especially moths, for which they forage after sunset in forest canopies or over streams and stagnant waters.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Bats of Canada」の詳細全文を読む スポンサード リンク
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