30' 47.4" N 29° 04' 10.9" E 21
uttered in hovering display flight, just a few metres
above the ground.
of a continuous reeling (over two minutes on this occasion)
of ~32 elements/sec, uttered in two distinct frequency
bands - half at 3.8 kHz, and half at 5.1
kHz, both increasing and decreasing in waves.
Click here for the MP3 file
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