The song of the chipping sparrow and the pine warbler is a similar trill. The chipping sparrow’s song sounds mechanical. It is a rapid series of notes that are similar in pitch. The pine warbler is a bit more musical and tends to be shorter in length with fewer syllables per song.
Pine warbler
Note: the songs are 1-1/2 to 2 seconds long.
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Chipping sparrow
The spectogram (bottom half of diagram) shows the uniformity of pitch and cleaner definition of the notes of the chipping sparrow throughout its song.
The songs are typically 2-1/2 to 3 seconds long.
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