Another important factor relating to roost suitability is tree condition. Indiana bats prefer dead or dying trees with exfoliating bark. The amount of exfoliating bark present on a tree seems to be insignificant. Indiana bats show an affinity for very large trees that receive plentiful sunlight. Typically, Indiana bats roost in snags, but a few species of live trees are also used. Live roost trees are usually shagbark hickory, silver maple, and white oak. Shagbark hickories make excellent alternate roosts throughout the Indiana bats' range due to their naturally exfoliating bark. Although Indiana bats primarily roost under loose bark, a small fraction roosts in tree cavities.