Song: A hard, nasal or buzzy "peeent" given while on the ground and while ascending in spiral flight, followed by a continuous series of modulating chips and chirps during descent flight to ground. The "peeent" is very similar to the call of Common Nighthawk but is lower and more resonant.
Sound: Monty Brigham (Bird Sounds of Canada); 1973 Mar 4; Canada, Ontario; Aylmer; Adult; Primary Sound;