Black-throated Blue Warbler

Setophaga caerulescens

Long-distance migratory Breeds in mature hardwood and mixed fore… Forest Songbird Song (male)

Learn to identify the Black-throated Blue Warbler by ear. Master the ""I am so lazzzy" buzzy series" phrase and tell it apart from similar species.

“"I am so lazzzy" buzzy series”

What the Black-throated Blue Warbler sounds like

Small warbler; male is deep blue above with black face and throat and white belly, female is olive-brown with pale yellow below. Both sexes show a white "handkerchief" patch on the wing. Breeds in eastern North America and winters in the Caribbean.

“"I am so lazzzy" buzzy series”

How to tell it apart

Listen for:Slow series of 3–7 buzzy notes, last one rising; alternate song a clearer 5-note phrase followed by a buzz. Often written as “"I am so lazzzy" buzzy series”.

Don't confuse with:The Black-throated Green Warbler — male has yellow face and olive back, not solid blue; female lacks wing patch and has yellow tones.

Where you'll hear it

Breeds in mature hardwood and mixed forests with thick undergrowth; winters in tropical forests and plantations.

Arrives on breeding grounds in late spring; migrates mostly at night in fall (Aug–Oct). Males hold summer territories and sing; both sexes join mixed flocks in winter.

Similar species

Black-throated Green Warbler

Male has yellow face and olive back, not solid blue; female lacks wing patch and has yellow tones.

American Redstart (female)

Female redstart is grey with yellow patches and no bold wing patch; tends to flash tail, unlike creeping behavior of BTBW.

Common Yellowthroat (female)

Yellowthroat female is smaller, yellower with no wing spot, and stays in marshy thickets, not high forest.

Black-throated Blue Warbler song FAQ

What does a Black-throated Blue Warbler sound like?

Slow series of 3–7 buzzy notes, last one rising; alternate song a clearer 5-note phrase followed by a buzz. Listen for the ""I am so lazzzy" buzzy series" phrase.

How do I tell a Black-throated Blue Warbler from a Black-throated Green Warbler by sound?

Black-throated Green Warbler: Male has yellow face and olive back, not solid blue; female lacks wing patch and has yellow tones..

When is the best time to hear a Black-throated Blue Warbler?

Arrives on breeding grounds in late spring; migrates mostly at night in fall (Aug–Oct). Males hold summer territories and sing; both sexes join mixed flocks in winter.