Chestnut-sided warbler.


 A pretty good day at the pond, had 4 warbler species plus all the usual ones.

Rondeau Provincial Park, Ontario, Canada, August 22, 2024.

Setophaga pensylvanica

The Chestnut-sided Warbler sings two basic songs: one is accented at the end (the pleased-to-meetcha song), and the other is not. Males sing the accented songs primarily to attract a female; once nesting is well underway they switch over to the unaccented songs, which are used mostly in territory defense and aggressive encounters with other males. 

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