Can imply “the alternation of two musical tones a diatonic next apart” or “a audio resembling a musical trill.” The flute-like trill of the wood thrush is perhaps the most stunning song of any North American hen. The descending trill of its relative the veery isn’t also shabby, either. is https://e-bookmarks.com/story3840167/birdwithmostwords-com-an-overview