Ligypterus najtae

The calling song of L. najtae n. sp. (Fig. 8) was recorded in the laboratory (Table 2). At 25°C (FO-male2), the song echeme is made of 20-25 syllables (m = 22.3 ± 1.4) and lasts for 300 ± 25 ms, for an echeme period of 2.44 ± 0.34 s (duty cycle = 12.2%). Most echemes show an irregular beginning comprising 2-3 syllables (m = 2.1 ± 0.3, n = 12), separated by a pause of 54 ± 10 ms from a more regular trill comprising 18- 23 syllables (trill duration = 215 ± 31 ms). Syllables are short (duration = 8.8 ± 0.1 ms; period = 11.5 ± 3.4 ms) and show a slightly indented amplitude pro le.  e spectrum shows a clear dominant peak at 18.54 ± 0.29 kHz corresponding to the third harmonic of a lower fundamental frequency (c. 6.2 kHz).

Compared to that of L. fuscus (Robillard et al. 2015; table 2), the song of L. najtae n. sp. has a similar echeme structure, but shows a longer irregular beginning and a slightly lower dominant frequency (19.73 kHz in L. fuscus). Syllables have a similar duration in both species, with a shorter syllable period in L. najtae n. sp. Song  les of two recorded specimens (MNHN-EO-ENSIF4165 and MNHN-EO-ENSIF4167) have been deposited in the MNHN Sound Library with the following inventory numbers, MNHN-SO-2017-32 and MNHN-SO-2017-33 respectively. [1]

References