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Bats fly mostly at night but some indication of the species by sight at dusk or dawn can be given by size, flight patterns and proximity to known roosts. An example is when doing a bat roost emergence count at dusk when the likely species is further confirmed using an acoustic bat detector.
The subfamilies Primicimicinae and Latrocimicinae use New World bats as their hosts, while Afrocimicinae and Cacodminae use Old World bats. Bats represent a convenient mammal to exploit as they roost communally, returning to the same roost regularly. It is perhaps to avoid the parasites that some species of bat regularly change roosts.
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Courtship territories are usually in the vicinity of popular winter roosts for the species. Males will patrol these territories while "singing" to attract the attention of female bats as they travel to winter roosts. Male courtship territories are densely-packed, offering female choice akin to a lek mating system. [12]
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Groups of C. perspicillata will roost in numbers from 10 to 100, in caves, hollow trees, and in tunnels. [3] They will usually roost during the day, and will forage at night. [3] There are two different types of roosts found in these bats, harems and bachelor roosts. [3] In a harem roost, there is a single male, some females and their offspring ...
Little brown bats are a species that will use bat houses for their roosts. [77] Landowners will purchase or construct bat houses and install them, hoping to attract bats for various reasons. Some install bat houses in an attempt to negate the effects of removing a colony from a human structure ("rehoming" them into a more acceptable space).
However, breeding evening bats have been found as far north as Michigan and as far west as the 100th meridian. [13] Evening bats roost in a variety of structures, including Spanish moss, under bark, in tree cavities, and in buildings. [18] For foraging habitat, evening bats in Georgia prefer pine forest, riparian zones, and open fields. [19]