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Fig. 2. Flight patterns for three different behaviors (A–C), along with the
corresponding spectrograms of the sounds produced by the bats (D–F).
(A,D) A bat flew through the hole. (B,E) A bat inspected the hole. (C,F) A bat
crashed into the net next to the landmark, at the usual position of the hole
relative to the landmark. (A–C) The bats' flight paths are displayed as
viewed from above. The net is indicated by a diagonal line and the opening is
marked in pink. The pink triangle represents the landmark's position along the
net in the specific trial. Blue circles denote the bat's position at the time
of vocalization and black arrows indicate flight direction. (D–F) In the
spectrograms, some of the pulses are clustered together in sound groups with
two or three pulses (bracketed). A vertical red line in the spectrogram shows
the time the bat flew through the hole, crashed into the net or started an
inspection.
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