Song: Clear shrill peeping and loud chips. Including "pip-pip--pip-pip-pip" or "bip-bip-bip". Other squeaks and chips including a loud "kip", a flat "peet" or "peeta" and an "imp imp" given while in flight. All vocalizations are delivered in rapid series.
Sound: Geoffrey A. Keller (
Macaulay Library, Cornell # 56868); 1991 May 6; USA, Arizona; 33 km NE from Tucson, Rose Canyon Campground; Adult; Primary Sound;