Figure 1. This song was recorded together with equally loud frog (?) calls (labels "a" in spectrogram). The song of the Gallinule consists of the series of short tone pulses with harmonics (one pulse with label "P"). The bird was vocalizing while flying over the water to join one or two conspecifics at the other side of the reservoir.

See fig. 2 for details of section with label B.

Figure 2. Details of section "B" from fig. 1. The short pulses P1, P2, P3 are from the Purple Gallinule. Each pulse is about 60-80 ms in duration, and consists of a fundamental of about 400-600 Hz, and harmonics. The two frequency sweeps labeled "a1" and "a2" are not from the Gallinule, but probably from some frog.