Although this is just ornamental, this Batman bat house is still adorable with its upside-down bat signal. It was made by Spanish design studio Estres to show that having bats around is important. According to the Organization for Bat Preservation:
“Bats are not pests, they actually help control insect pests. An individual bat can eat thousands of mosquito-sized insects in one night. Bats are critical components to many ecosystems because they help control insect populations, pollinate flowers and fruit bats aid in seed dispersal.”
There are also plans available to build your own bat house.