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1 September 2005 Echolocation behaviour of Phyllops falcatus (Chiroptera: Phyllostomidae): unusual frequency range of the first harmonic
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Abstract
We studied the echolocation calls emitted by Phyllops falcatus (Chiroptera: Phyllostomidae) during foraging, in the field and in the lab. Calls emitted in free flight, in a more or less uncluttered situation, were about 4.5 ms (up to 5.3 ms) long and characterized by a sweep of the first harmonic (= fundamental) from ca. 73 kHz down to about 23 kHz, which is unusually large for phyllostomid bats. A less intense second harmonic was always present. The intervals between pulses varied between 55 and 170 ms with a mean of about 110 ms. During approach to bushes or trees (or during flight in confined space between bushes), or in the flight room, calls became shorter (ca. 2 ms) and more energy was allocated to the second harmonic, sometimes also a third harmonic appeared. During approach to a fruit calls were further shortened (about 1 ms or less), and call frequency increased to about 5 calls/100 ms, calls often being grouped. The large bandwidth of the first harmonic separates Phyllops from all other Cuban bat species and allows identification in the field.
Silvio Macías, Emanuel C. Mora, Corinna Koch and Otto Von Helversen "Echolocation behaviour of Phyllops falcatus (Chiroptera: Phyllostomidae): unusual frequency range of the first harmonic," Acta Chiropterologica 7(2), (1 September 2005). https://doi.org/10.3161/1733-5329(2005)7[275:EBOPFC]2.0.CO;2
Received: 21 December 2004; Accepted: 1 May 2005; Published: 1 September 2005
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