BioAcoustica is a free, open repository of wildlife sound recordings from the Natural History Museum, London.
Taxonomic index of the BioAcoustica collection
Acoustic and biological measurements in the BioAcoustica collection
Recording annotations from ann-o-mate
The specimens that recordings are of, from the collections
Where the specimens that recordings are of were collected, not where the sound was recorded
| Morris, Glenn K.; Beier, Max (1982). Song Structure and Description of Some Costa Rican Katydids (Orthoptera: Tettigoniidae). Transactions of the American Entomological Society, 108(1/2): 287-314. |
L. hebardi is a common night singer at Monte Verde. Calling males occurred in groups along Senderos Chomogo and Pantanoso of the reserve and bordered the road approaching the Centro de In formacion. They were usually perched well out of reach in the pathside shrubs or canopy. Males are light green and about 3.5 cm from vertex to termini tip. Large leathery termini enclose the abdomen with a prominent costal field. The male's cubito-anal region (sound field) in both tegmina bears a conspicuous glassy an recessed mirror, bordered by robust elevated brown veins. L. hebardi song is resolved by the human ear as a two-lisp chirp (kate-ee). Each chirp lasts about 150 ms and is given at intervals of 2 or more seconds. There are 10 pulse trains in each chirp (Fig. 3) contrasting with only 4 in northern P. camellifolia. A human listener perceives the first 4 and the last 4 pulse trains as elementary sounds: 'kate' and 'ee' respectively. The 2 low-amplitude pulse trains that intervene are not detected. The 4 pulse trains of the second lisp always attain greater amplitude than any of those in the first. If the taped L. hebardi chirp is played back at a speed reduced by a factor of 4, the listener is able to resolve all 8 major pulse trains. The effect is remarkably like a song of southern P. camellifolia: there are 2, rapidly repeated, 'kate-ee-she-did' signals. Thus an AM pattern with a strong similarity to that of P. camellifolia is nested within the chirp of L. hebardi, though occuring at a much greater pulse train repetition rate.