Birds diurnal

Tennessee Warbler

Leiothlypis peregrina

An energetic traveler of the treetops, the Tennessee Warbler is a master of migration. Watch for its sharp bill and bright white undertail as it visits backyard gardens on its journey from the boreal forest to the tropics.

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Quick Identification

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Size

4.3–5.1 in (11–13 cm) long; wingspan of 7.5–8.3 in (19–21 cm); weighs 0.3–0.5 oz (8–13 g)

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Colors

Breeding males have a sharp gray cap, white eyebrow, and olive-green back. Females and non-breeding birds are more uniform olive-yellow.

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Key Features

Thin, very sharp-pointed bill
Distinctive white line over the eye (supercilium)
Bright white undertail coverts (essential for ID from below)
Completely lacks wing bars or tail spots

When You’ll See Them

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Activity pattern diurnal

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Peak hours 6:00 AM – 10:30 AM

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Season May (Spring migration) and September-October (Fall migration)

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Diet Primarily insects like caterpillars and beetles during summer; switches to nectar, berries, and small fruits during migration and winter.

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Habitat Boreal forests for breeding; during migration, they frequent forest edges, brushy fields, and suburban backyards with mature trees.

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Behavior

The Tennessee Warbler is a restless and energetic songbird known for its constant movement. During the breeding season in the boreal forests, it is a specialist of the spruce budworm, often seen acrobatically gleaning insects from the tips of coniferous branches. While it carries the name of a US state, it is primarily a bird of passage in most of North America, stopping only briefly to refuel during its long migration between Canada and Central America.

In the winter, its behavior shifts dramatically. It becomes highly social, joining mixed-species flocks and visiting flowering trees to drink nectar. It uses its uniquely sharp bill to pierce the base of flowers or probe hummingbird feeders. In a backyard setting, they are most often seen flitting through the mid-to-upper canopy of deciduous trees, rarely staying still for more than a few seconds at a time.

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Camera Tips

To capture a Tennessee Warbler on your AI camera, you must focus on their love for water and high-energy foraging. These birds are rarely interested in standard seed feeders, but they are highly attracted to the sound of moving water. Position your camera near a birdbath equipped with a 'wiggler' or a solar-powered fountain. Set the camera at a slight upward angle, roughly 2-3 feet from the water source, to capture the diagnostic white undertail coverts as they dip and dive.

Because these warblers are exceptionally fast, your camera settings are critical. Use a 'Fast' trigger speed setting if available, and set the capture mode to a 5-10 second video clip or a multi-shot burst. Tennessee Warblers often visit 'sap wells' created by woodpeckers; if you have a tree with active sapsucker holes, mounting your camera nearby can provide a unique look at these birds feeding on both the sap and the insects attracted to it.

In the fall, these birds are much more yellowish and can be easily confused with other species. To get the best identification footage, place your camera in an area that receives bright, indirect morning light. Avoid placing the camera where it faces the direct sun, which can wash out the subtle olive-green tones of their plumage. If you live in a southern climate where they winter, try placing a camera near nectar-rich plants like Salvia or even near a hummingbird feeder, as they are known to steal a quick drink.

Similar Species

Species that look similar or are commonly confused with Tennessee Warbler.

Orange-crowned Warbler

Orange-crowned Warblers have yellow undertail coverts and blurry streaks on the breast, whereas Tennessee Warblers have white undertail coverts and unstreaked breasts.

Red-eyed Vireo

The Red-eyed Vireo is larger with a thicker, hooked bill and a much bolder black border around its gray cap.

Warbling Vireo

Warbling Vireos have a much thicker, blunt-tipped bill and lack the sharp, pointy appearance of the Tennessee Warbler's face.

Frequently Asked Questions

Tennessee Warblers are most active in the early morning, typically from sunrise until about 10:00 AM, when they are most vocal and foraging heavily for insects to fuel their migration.

The best way to attract Tennessee Warblers is with a moving water feature like a dripper or mister. They are also drawn to native flowering trees and shrubs that host the small insects they eat.

Their diet consists mostly of insects and spiders, but they are also known for having a 'sweet tooth,' frequently consuming nectar from flowers and juice from berries during the winter and migration.

Yes, they are very common in suburban backyards during the spring and fall migration, especially in areas with plenty of mature trees and water sources.

Look at the undertail coverts: the Tennessee Warbler's are bright white, while the Orange-crowned Warbler's are yellow. Additionally, the Tennessee has a much more prominent white eyebrow stripe.

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