Chestnut-sided Warbler: Medium warbler with black-streaked upperparts, white underparts, and chestnut-brown flanks. The cap is bright yellow and moustache stripe is black. Often cocks its tail high above its back as it feeds. The only North American warbler with pure white underparts in all seasons.
Range and Habitat
Chestnut-sided Warbler: Breeds from south-central Canada east to Nova Scotia, south to east-central U.S., and in the Appalachian Mountains. Spends winters in the tropics. Preferred habitats include young, open, second-growth woodlands and scrub.
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.
They are very rare vagrants to western Europe.
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.
A group of warblers has many collective nouns, including a "bouquet", "confusion", "fall", and "wrench" of warblers.
The Chestnut-sided Warbler is currently rated as Least Concern. This bird species primarily breeds in the eastern regions of North America and southern portions of Canada. This bird has also been spotted in the Great Lakes region. This is a migratory bird that travels to Central America during the winter. It has also been spotted in Western Europe. Due to an increase in population of late, this bird is not considered to be in immediate danger of population decline.