Connecticut Warbler

The Connecticut Warbler is one of the most sought-after and elusive of the New World warblers, a large, big-headed, chunky bird with a complete, bold white eyering that gives it a distinctive owlish stare. Adult males have a gray hood, while females and immatures show a more subdued brownish-gray hood, but both share the striking white spectacles and olive-green upperparts with yellow underparts.

Unlike most warblers, it has notably long legs and long undertail coverts, and it moves by walking rather than hopping, a trait shared with the two waterthrushes and lending it a subtly different, more deliberate gait.

Key field marks

• Complete, bold white eyering on an otherwise plain face
• Gray hood (male) or brownish-gray hood (female/immature)
• Olive-green upperparts, yellow underparts
• Long legs, long undertail coverts, and a walking gait rather than hopping
• Larger and chunkier overall than most other warblers

Similar species

Mourning Warbler and MacGillivray's Warbler both lack a complete bold eyering (Mourning has none or a faint broken one; MacGillivray's has broken crescents, not a full ring) and both hop rather than walk. Nashville Warbler also has a complete white eyering but is much smaller, with a contrasting gray head and olive back, and lacks the Connecticut's bulky build and long legs.

Connecticut Warblers breed in a narrow band of boreal habitat across central Canada and the north-central United States, favoring sphagnum bogs, muskeg, and open poplar or aspen woodland with a dense shrub or sedge understory.

They undertake a notable migratory route, moving mostly through the Great Lakes and Appalachian regions in spring, but tending to migrate farther east and offshore along the Atlantic seaboard in fall before crossing to their wintering grounds in South America, primarily in the Amazon basin.

Behavior and voice

Connecticut Warblers are famously secretive, walking slowly and deliberately through dense ground cover while foraging for insects and spiders, and they are reluctant to fly into the open, making them a challenging species to observe well despite being fairly large.

The song is a loud, rolling, repetitive series often rendered as "beecher-beecher-beecher-beecher" or "whip-ity whip-ity whip-ity whip."

Nesting

The nest is built on the ground, typically hidden in a mossy hummock or at the base of dense shrubs in a bog, made of grass, moss, and leaves. Clutches usually contain 3-5 eggs.