There's a short window of a couple weeks per year when one can hear the song of the Tennessee Warbler in Southern Ontario, and on this May morning at Fifty Point Conservation Area there were no shortage of these high-pitched songsters.
Recorded, engineered, narrated and created by Rob Porter.
Creative Commons music by Kai Engel - https://www.kai-engel.com/
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Find out more at http://5khz.songbirding.com