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
Male Pithecopus rusticus vocalized from October– January, 19:00–00:00 at temperatures from 16.1–19.4°C. Males emitted three types of calls: one advertisement call and two territorial calls, referred to as territorial call I and territorial call II. The advertisement call (Fig. 2, Table 1) consisted of a short note with a duration of 0.023 ± 0.002 ms (0.019–0.033 ms, n = 244), two pulses, and a dominant frequency of 2,311.028 ± 159.155 Hz (1,924.500–2,830.200 Hz, n = 244). Territorial call I (Fig. 3, Table 1) was emitted dur- ing male interactions. Its duration was 0.095 ± 0.043 ms (0.033–0.166 ms, n = 27) and dominant frequency was 2,264.904 ± 92.101 Hz (2,037.700–2,388.600 Hz, n = 27). This call consisted of two notes. The first note was 0.022 ± 0.005 ms (0.016–0.039 ms, n = 27) long and was composed of two pulses. The second note was 0.008 ± 0.002 ms (0.004–0.013 ms, n = 27) long and was composed of a single pulse. On four occasions, we ob- served the males interspersing advertisement calls with territorial call I. Territorial call II (Fig. 4, Table 1) was emitted after territorial call I during interactions between male posi- tioned ca. 20 cm apart. Its duration was 0.911 ± 0.340 ms (0.504–1.346 ms, n = 9) and dominant frequency was 2,122.867 ± 139.496 Hz (1,924.500–2,274.900 Hz, n = 9). Territorial call II consisted of a single, multipulsed note. The 12 recorded males measured 35.33–38.44 mm and weighed 3.0–4.6 g. Air temperature affected the duration of the advertisement call, with males decreas- ing advertisement call duration at higher temperatures (R2 = 0.53, p = 0.01; Fig. 5). There was no influence of SVL (R2 = 0.11, p = 0.28) or weight (R2 = 0.00, p = 0.86) on the dominant frequency of the advertisement calls.