Bioacoustics of Fejervarya orissaensis

( Fig 4D ) Specimens examined: two males (WIIAD 227 & WIIAD 249) and an individual with sex undetermined (WIIAD 066). Morphological features: Adult males SVL 42.7–42.9 mm (n=2) and an individual (sex unknown) SVL 39.4 mm ; body robust; head slightly longer than wide; snout obtusely pointed in dorsal view; eyes large; tympanum distinct, nearly ½ the diameter of eye, distinct supratympanic fold; tubercles present on dorsal and lateral body, short longitudinal ridges on mid-dorsum, fejervaryan lines on abdomen; fingers without disc and rounded, relative length of fingers II = IV <I <III; poorly developed toe webbing, toes tips rounded, relative length of toes 1<2<5<3<4, inner metatarsal tubercle elongated. Calling males had subgular paired vocal sac. Coloration in life : Brown dorsum with dark grey spots; fore limb and hind limb cross-barred with dark grey; upper and lower jaws marked with bands; pale yellow mottling on posterior thigh; ventral side of body white. Vocal sac of calling male was black. Bioacoustics: We analysed 50 advertisement calls from five males. Calls were recorded between 22:40–00:20 hours and calling site air temperature was between 26.9°C–29.9°C. The calls were pulsatile and emitted mostly at regular intervals. The calling males produced single type calls with mean call duration of 98.76 ± 8.69 ms (82–109 ms). The pulse rate was 104.46 ± 2.03 pulses/s (94.59–107.53 pulses/s) with mean of 9.76 ± 0.98 pulses per call. The mean dominant frequency was 2412.59 ± 6.34.95 Hz (1162.80–2842.40 Hz).