 The letter-winged kite is generally silent when alone but often noisy when breeding or roosting communally at night, beginning to call at the rising of the moon.Its calls have been described as chicken-like chirping or a repeated loud kacking, and at times resemble those of the barn owl or black-shouldered kite.A rasping call, or "scrape", composed of six or seven half-second long notes is the main contact call between a pair.