WILD FACTS

BLACK-THROATED BLUE WARBLER

Average Size

Length: 5-5.5 inches
Wgt.: 9-11g

Food

Mainly insects and other invertebrates

Breeding and Young

More than one brood per year evidently common, clutch size usually 4, female selects nest site, usually builds nest and incubates eggs; incubation about 12-13 days and young leave nest in about 8 –9 days; cowbird host.

Life Expectancy

At least 9 years

Threats

Some killed in collisions with buildings and other structures during migration. Widespread clearing of forests can depress breeding population levels on a regional or local scale. Deforestation in the Caribbean likely a serious future threat.

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