Chestnut-sided Warbler

About This Species

The Chestnut-sided Warbler is a lively, brightly patterned songbird often found in shrubby edges, young forests, and overgrown fields. Breeding males are especially striking, with bold chestnut stripes along their sides, a bright yellow crown, and crisp black-and-white facial markings. Females and nonbreeding birds are softer and greener in appearance but share the same energetic behavior. Constantly on the move, these warblers flit through foliage as they search for insects.

Fun Facts

• Name tells the story: The chestnut-colored side stripes of breeding males give this warbler its distinctive name.
• Edge specialist: They thrive in second-growth habitats like regenerating forests, thickets, and woodland edges.
• Famous song: Their cheerful 'pleased, pleased, pleased to meetcha!' song is a favorite among birders.
• Seasonal makeover: Outside of breeding season, males lose their bold chestnut stripes and look much more like females.
• Insect hunters: They actively forage by hopping and darting through leaves, often flicking wings and tails.