Bat activity was measured acoustically using Anabat II bat
detectors connected to zero-crossings analysis interface modules
(Anabat CF Storage ZCAIM; Titley Electronics, Ballina Australia). Bat
activity was measured using 4 bat detectors that were moved
among the 16 sites within two 12-day periods in May and June
2007. At each site, bat activity was recorded from dusk until dawn,
for three consecutive nights each month. Calls were analyzed using
Analook (Version 4.9 g) and Microsoft Access software. Bat activity
is reported as mean minutes of bat activity per night.