Chestnut-sided Warbler

Setophaga pensylvanica




Wood-Warblers (Parulidae)

Code 4


Code 6



Egg Color:

White to pale green with purple and brown blotches

Number of Eggs:

3 - 5

Incubation Days:

11 - 13

Egg Incubator:


Nest Location:

1 - 4 feet above ground.

Nest Material:

Bark chips, vines, and plant material with lining of animal hair and grasses.





Chestnut-sided Warbler: Medium-sized warbler with black-streaked upperparts, white underparts, and chestnut-brown flanks. Cap is bright yellow and moustache stripe is black. Female has less chestnut-brown on flanks. Winter adult and juvenile have lime-green upperparts, conspicuous yellow eye-ring, dark gray wings with two yellow bars, and gray underparts.

Range and Habitat

Chestnut-sided Warbler: Breeds from south-central Alberta east to Nova Scotia, south to east-central U.S. from New England to the Great Lakes region, and in the Appalachian Mountains. Spends winters in the tropics from southern Mexico and the West Indies south. Preferred habitats include young, open, second-growth woodlands and scrub.

Breeding and Nesting

Chestnut-sided Warbler: Three to five brown and purple blotched, white to pale green eggs are laid in a grass-and-bark nest lined with hair and rootlets, and built a few feet above the ground in a small tree or bush. Incubation ranges from 11 to 13 days and is carried out by the female.

Foraging and Feeding

Chestnut-sided Warbler: Feeds mostly on insects and some fruits. Forages alone, searching undersides of leaves, hopping from branch to branch with tail cocked.


Chestnut-sided Warbler: Song is rich and musical with an emphatic ending, sometimes interpreted as "please-please-pleased to meetcha."

Similar Species

Chestnut-sided Warbler: Bay-breasted Warbler has brown crown and dark throat. Golden-winged Warbler resembles immature, but has a dark throat and cheek patch.


Belly, undertail coverts, chest, flanks, and foreneck.

Back, rump, hindneck, wings, and crown.
The area on top of the head of the bird.
Parts of a Standing bird X
Head Feathers and Markings X
Parts of a Flying bird X