Song: Distinctive repetitive ringing 3-parted whistle "pill-will-WILLET". Peeping "kli kli kli" alarm calls increase in frequency as bird becomes more agitated. Flight calls are clear and ringing 'kli-kli-kli" harsher and more slurred than Greater Yellowlegs.
Sound: Lang Elliott; 1988 Jun 19; USA, Virginia; Adult; Primary Sound; Flight call;