Can imply “the alternation of two musical tones a diatonic 2nd aside” or “a audio resembling a musical trill.” The flute-like trill from the Wooden thrush is Probably the most beautiful tune of any North American chicken. The descending trill of its relative the veery isn’t far too shabby, either. https://travialist.com/story8457685/not-known-factual-statements-about-birdwithmostwords-com