English: Appeasement vocalization. A scrolling spectrogram and waveform (Avisoft Bioacoustics) to visualize a segment of vocalizations emitted during the 5-s prior to the bats roosting together in Video S7 . The lone roosting bat emits low-intensity appeasement vocalizations, whereas the unsettled bat produces overlapping high-intensity biosonar pulses. The biosonar pulses were saturated due to the high gain of this microphone, and were not included in any analyses. Note that the high gain level also records shuffling movement noise of the bat (appears as low-intensity broadband noise), as well nail clicks against the cage mesh (appears as low-intensity, short broadband clicks), that are not vocal signals. Playback is slowed to a sampling rate of 44.1 kHz.