Watercolor portrait of Worm-eating Warbler (Helmitheros vermivorum)

Worm-eating Warbler

Helmitheros vermivorum
It breeds in the eastern United States a… Look for it in mature deciduous forest w… Uncommon Dry Buzzy Trill

Learn to identify the Worm-eating Warbler by ear. Master the "tsee-tsee-tsee-tsee-tsee" phrase and tell it apart from similar species.

“tsee-tsee-tsee-tsee-tsee”

What the Worm-eating Warbler sounds like

A slim, sneaky warbler of shady woods, the Worm-eating Warbler looks more like a tiny striped sparrow than a flashy songbird. It creeps through tangles and leaf litter with a pointed bill, showing warm brown upperparts, clean buff underparts, and bold black crown stripes.

“tsee-tsee-tsee-tsee-tsee”

How to tell it apart

Listen for:A fast, thin, insect-like trill that runs evenly for a second or two. It can sound more like a tiny sewing machine or summer insect than a bird. Often written as “tsee-tsee-tsee-tsee-tsee”.
Don't confuse with:The Ovenbird — ovenbird has a bold white eye-ring; worm-eating warbler does not.

Where you'll hear it

Look for it in mature deciduous forest with dense understory, especially on wooded slopes, ravines, and brushy hillsides. It loves places with thick leaf litter and low tangles where it can stay half-hidden.

Spring brings dry, insect-like trills from shady woods as males claim territory. By late summer and fall, birds grow quieter and slip through understory cover during migration.

Similar species

Ovenbird

Ovenbird has a bold white eye-ring; Worm-eating Warbler does not.

Black-and-white Warbler

Black-and-white Warbler is sharply black-and-white striped all over, not warm brown and buff.

Swamp Sparrow

Swamp Sparrow has a thicker conical bill for seeds, not a thin insect-picking bill.

Worm-eating Warbler song FAQ

What does a Worm-eating Warbler sound like?
A fast, thin, insect-like trill that runs evenly for a second or two. It can sound more like a tiny sewing machine or summer insect than a bird. Listen for the "tsee-tsee-tsee-tsee-tsee" phrase.
How do I tell a Worm-eating Warbler from a Ovenbird by sound?
Ovenbird: Ovenbird has a bold white eye-ring; Worm-eating Warbler does not.; Ovenbird is heavier-bodied with strong breast streaks; Worm-eating is plain underneath.; Both have striped heads, but Worm-eating looks cleaner, slimmer, and more buff overall..
When is the best time to hear a Worm-eating Warbler?
Spring brings dry, insect-like trills from shady woods as males claim territory. By late summer and fall, birds grow quieter and slip through understory cover during migration.