I'm not sure if bats would recognize the symbolic shape of the entrance hole, but this work by Estres studio is definitely capable of putting a smile on the viewers' faces. From their website: "Mus as an ornamental object, recreates an upside down jail and represents the bats’ lost homes. An animal that has been vilipended by man, with a fundamental role in our environment and hitherto a terribly endangered species."
Website: www.estudioestres.com