Phrynobatrachus krefftii Boulenger, 1909
Males call from the edge of shallow water or while under vegetation within the water. Calls consist of low-pitched notes that are produced rapidly at the beginning and becoming progressively slower. A typical call consists of 13 notes with a duration of 2.7 sec at an initial rate of approximately 8 notes/ sec. The emphasized frequency is 2.3 kHz (Channing and Howell, 2006).