recording. We did not use feeding buzzes as a sign of bat
activity because they were very scarce throughout the
surveys. We recorded relevant weather variables (temperature
and humidity) using a pocket weather meter (Kestrel®
3000, Nielsen Kellerman, Boothwyn, PA, USA) and the
time since civil twilight. We did not sample on nights with
rain, strong winds or with conditions adverse to bat activity
(Russo & Jones, 2003).