Roosting
The common bent-wing bat is a bat that forms major colonies and the longest period of torpor (hibernation) observed was about 12 days. These colonies can range anywhere from a few dozen or several million bats. Most of these colonies are formed in large caves or mines but they can also be found in other areas such as tunnels or ruins or other man made sites. In these roosting sites the common bent-wing bat establishes its colony in a "bell-shaped" hollow, which traps body heat and raises the temperature of the roost higher than the surrounding portions of the cave. This method of trapping warmth is used to reduce energy loss from shivering. Also, they will often enter hollows through small openings in order to better secure themselves from large predators during torpor. The common bent-wing bat migrates multiple times a year depending on weather of the roosting area; the length of these migrations can vary but the longest migration recorded was 833 km.
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Famous quotes containing the word roosting:
“Sometimes I lifted a chicken that warn’t roosting comfortable, and took him along. Pap always said, take a chicken when you get a chance, because if you don’t want him yourself you can easy find somebody that does, and a good deed ain’t ever forgot. I never see papa when he didn’t want the chicken himself, but that is what he used to say, anyway.”
—Mark Twain [Samuel Langhorne Clemens] (1835–1910)