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Bats Roosts

Bats are among the few mammals that do not build their shelter.

Bat roosts can be found in:

Caves

Any cavity naturally developed in rocks, generally soluble, from several meters to hundreds of miles is a cave.

The areas where bats have their roost are not situated far from the entrance of a cave but there are also exceptions (At Sura Mare Cave bats were present at about 2 kilometers from the entrance).

Generally bats prefer cavesupward, with one opening,crossed by rivers. Galleries trap warm airupward, and the water provides the optimum humidity in the bat roosts.

Worldwide there are caves with huge coloniesof bats. At the Niah Cave (Sarawak) there are about 300,000 bats and in Bracken Caves(USA), the population of bats exceeds several million individuals.

These are important touristic attractions for the show offered by thebats out hunting, with the dusk.
Caves can provideshelter for hibernationcolonies and thematernity.

Forest Roosts

Many experts believe that the ancestors of bats were arboreal bats.

Bats in the warm area of the world occupy different parts of the tree – they cling to the stem, the branches, between leavesand between roots. In temperate areas, they prefer the old tree hollows.

Artificial Roosts

In the absence of caves man-made shelters are preferred. They aredifferent, depending on the geographic area and construction features.
What they have in common is that they are far from anthropogenicsources of noise and light.

Wells and underground silos, abandoned mininggalleries, barns, cellars, bridges, buildings, religious buildings (temples, arches,bell towers) havethese features.

Sometimes bats can accommodatevery tight placessuch as cracks in walls.