Here is an example of a Rufous and White Wren (Thryothorus rufalbus) song. This and two other songs were recorded within a few hundred meters and within a two-hour period. Notice that, although the songs are all different, they share common structure - a lead-in note or phrase, followed by a variable-speed trill and ending with an upturned punctuation note.
Douglas Von Gausig (recordist; copyright holder), Naturesongs.com
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