Figure 2: Building type and roof design of buildings evaluated in the survey. We classified modern buildings as those with walls and flooring built from finished materials (e.g., cement and tiles), and traditional as those with walls and flooring built from unfinished materials (e.g., compacted earth). Modern-style designs often have exposed structural beams and ceilings, whose spaces create roosting habitat for synanthropic free-tailed bats. Triangular roofs provide a taller apex for bat emergence, needed for molossid bats to take flight due to their wing morphology25. The added height from triangular roofs also keeps roosting bats out-of-easy-reach from people, and makes disturbance more difficult.