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
| Sphyrometopa femorata | 0:04 |
| 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. |
The song is a steady sequence of paired lisps (Fig. 13). At 16 C 16 lisp pairs are repeated in 10 s. The oscilloscope resolves each lisp into a very faint minor pulse train followed by a much longer in tense major pulse train. This PTG remains the same for both lisps of the pair. The complex-wave pulses of the trains tend to run together toward the concluding half of the major pulse train. The spectrum (Fig. 2) has a very tall sharp peak near 11 kHz and a broader higher frequency peak centred on 27 kHz. It is possible to confuse the song of S. femorata with the two-lisp call of L. hebardi, but S. femorata appears to have a higher song rate for any temperature and there are quality differences e.g. a quavering quality to Lophaspis due to the greater number of pulse trains per lisp; the double lisp of S. femorata thus sounds 'crisper'.