Bat boxes and roost features provide important welfare and conservation support for declining bat populations by compensating for loss of natural roosting sites.
Bat roost provision addresses a genuine welfare and conservation need created by human alteration of the landscape. Old buildings, mature trees, and caves that provided natural roosting sites have declined through development, tree removal, and building renovation. Bats in inadequate roosting conditions may experience thermal stress, reproductive failure, and predation vulnerability. Maternity colonies require warm stable temperatures for pup development - roosts that fluctuate excessively or allow predation access cause pup mortality and maternal stress. Installing bat boxes on suitable structures provides direct welfare benefit by supplementing natural roost availability, though boxes must be installed correctly to actually attract and benefit bats.