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Fig. 6. Typical trials showing signal duration (black line) and pulse interval (PI;
blue line) when the bat (A) flew through the hole (F1), (B) crashed into the
net (M2), or (C) inspected the net (M2). In C the zero indicates the start of
the inspection behavior (see Materials and methods and
Fig. 2B). Note in B how the
pulse interval shifted up and down as the pulses were produced in little sound
groups (in red circle). Further, note the high rate sound group (indicated by
arrows) just before the bat crashed, showing very short signal durations and
intervals.