Bat prevent them from spending too much time in unfamiliar places, and decrease predation. In some species, pregnant individuals may not use torpor. The smallest bat is Kitti's hog-nosed bat ("Craseonycteris thonglongyai"), which is long with a wingspan and weighs . It is also arguably the smallest extant species of mammal, next to the Etruscan shrew. The largest bats are a few species of "Pteropus" megabats and the giant golden-crowned flying fox, ("Acerodon jubatus"), which can weigh with a wingspan of . Larger bats tend to use lower frequencies and smaller bats higher for echolocation; high-frequency echolocation is better at detecting
Bats of Canada their ability to fly, and rarely become aggressive. Careless handling of bats is the main cause of rabies transmission, which has resulted in five human cases in Canada since 1925. Fewer than 2% of bats in Canada are rabid, 95% of which are big brown bats. Testing bats for rabies is usually performed by the Canadian Food Inspection Agency. Inhalation of dusty bat manure may result in histoplasmosis, which will present as a mild respiratory infection. There are no pesticides that may be used on bats in Canada. In 2011, the Nature Conservancy of Canada received a $50,000 grant from