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
| lab recording, 8/7/1985, 28°C, position-detection lamp (Racal with B&K 1/4", tape no. R85-2) | 0:16 |
The male calling song consists of single syllables, but these syllables are much long- er (ca. 150 ms at 20 °C; Heller and Willemse 1989) than in the species mentioned above and contain three groups of impulses. The last group is the loudest and decreas- ing in amplitude. The females answered with a fixed delay of about 60 ms after the last syllable group. Judging from the female reaction to the male song it would have been difficult to determine the trigger point for the response, but all three females tested answered to click-like song models with the same latency as to the beginning of the last group of impulses in the male song. Interestingly, one of these females had a bi-modal distribution of latency times. It switched irregularly between ‘normal’ response times (69±6 ms, range 58–78 ms, n=10) and much longer ones (136±6 ms, range 128–143 ms, n=10; see Fig. 1, open symbol).