Plectrohyla ixil Stuart 1942

Advertisement call of Plectrohyla ixil (Fig. 4E–H). We examined a total of five calls from one individual of Plectrohyla ixil recorded in a time lapse of about 1 min at air temperature of 15ºC. The vocalization of P. ixil is a long, single call with a fully pulsatile structure. The call is amplitude-modulated, with one or two major peaks occurring throughout the call duration, showing an irregular or asymmetric modulation pattern. Call duration is 244 ± 28 ms (220–280 ms). The intercall interval is 11 ± 5 s (5–18 s). Calls have no frequency modulation. The minimum frequency of the call is 692 ± 139 Hz (496–832 Hz), the maximum frequency is 1,756 ± 208 Hz (1,463 –1,987 Hz), and the dominant frequency is 1,274 ± 83 Hz (1,125 –1,312 Hz).