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      Hearing and evasive behaviour in the greater wax moth, Galleria mellonella (Pyralidae)

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      Physiological Entomology
      Wiley

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          The echolocation and hunting behavior of the bat, Pipistrellus kuhli.

          The echolocation and hunting behavior of Pipistrellus kuhli was studied in the field using multi-exposure photography synchronized with high-speed tape recordings. During the search phase, the bats used 8-12 ms signals with sweeps (sweep width 3-6 kHz) and pulse intervals near 100 ms or less often near 200 ms. The bats seemed to have individual terminal frequencies that could lie between 35 and 40 kHz. The duty cycle of searching signals was about 8%. The flight speed of hunting bats was between 4.0 and 4.5 m/s. The bats reacted to insect prey at distances of about 70 to 120 cm. Given the flight speed, the detection distance was estimated to about 110 to 160 cm. Following detection the bat went into the approach phase where the FM sweep steepened (to about 60 kHz bandwidth) and the repetition rate increased (to about 30 Hz). The terminal phase or 'buzz', which indicates prey capture (or attempted capture), was composed of two sections. The first section contained signals similar to those in the approach phase except that the pulse duration decreased and the repetition rate increased. The second section was characterized by a sharp drop in the terminal frequency (to about 20 kHz) and by very short pulses (0.3 ms) at rates of up to 200 Hz. Near the beginning of the buzz the bat prepared for capturing the prey by extending the wings and forming a tail pouch. A pause of about 100 ms in sound emission after the buzz indicated a successful capture (Fig. 4).(ABSTRACT TRUNCATED AT 250 WORDS)
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            Echolocation signals of the bat Eptesicus serotinus recorded using a vertical microphone array: effect of flight altitude on searching signals

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              Echolocation in two very small bats from Thailand Craseonycteris thonglongyai and Myotis siligorensis

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                Author and article information

                Journal
                Physiological Entomology
                Physiol Entomol
                Wiley
                0307-6962
                1365-3032
                December 2000
                December 2000
                : 25
                : 4
                : 354-362
                Article
                10.1046/j.1365-3032.2000.00204.x
                f73cdfc9-d6dc-446b-a109-bc1beb8c787f
                © 2000

                http://doi.wiley.com/10.1002/tdm_license_1

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