Libraries Home To a Colony Of Bats

If you probably think of a cleaning crew for a library of big castle size, the first thing that would come to mind is of humans. But the library at the University of Coimbra, Central Portugal “Biblioteca Joanina, ” might consider an exception. Biblioteca Joanina uses several interesting techniques for the maintenance of their book collection. Some of these include the thick external walls, maintaining room temperature, shelves made entirely of oak. And of all, what makes it more fascinating, is the colony of bats that visit at night to dine on book-damaging insects.
Among the two libraries, around the world, Biblioteca Joanina is one of them that consists of a military of bats to protect books from insects, while “Mafra palace" library, Portugal, being the other.