Chestnut-sided Warbler
The Chestnut-sided Warbler sings two song types: one is accented at the end, the other is not. The first is used before the arrival of the females and in the early nesting cycle. The second is used while raising young. With the clearing of primeval forests and the subsequent growth of shrubby habitats, it is one of the most abundant breeding warblers in second growth deciduous woodlands.
Chestnut-sided Warbler
The Chestnut-sided Warbler sings two song types: one is accented at the end, the other is not. The first is used before the arrival of the females and in the early nesting cycle. The second is used while raising young. With the clearing of primeval forests and the subsequent growth of shrubby habitats, it is one of the most abundant breeding warblers in second growth deciduous woodlands.