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Regenerating environments such as abandoned agricultural land, logging, etc.
The Chestnut-sided Warbler has a yellow cap surrounded by black and brown stripes on the flanks. The back is dark, striped with yellow-green. Female and male are similar, but female's yellow is duller and she has less brown on flanks. This warbler has a wingspan of 20 cm, measures about 12 centimeters and weighs up to 12 grams, which is about the weight of a strawberry! She lives about 7 years.
This warbler is mainly insectivorous and feeds mainly at the bottom of bushes and small trees, on small flies and larvae. Chestnut-sided Warbler pursues its prey by hopping from branch to branch and flipping leaves. The male establishes his territory by singing continuously and adopting aggressive behavior before the arrival of the females.
Chestnut-sided Warblers overwinter in groups with other bird species and reunite with the same group each winter.
The males are very quarrelsome, even with the females, when they arrive in the spring!
These warblers are monogamous!