MacGillivray's Warbler is a small, active warbler with olive-green upperparts, bright yellow underparts, and a gray hood that extends to the breast, with a prominent white eye-arc.
Where to spot
Breeds in western North America, from Alaska south through the Rocky Mountains to California. Winters in Mexico and Central America.
How to spot
Look in dense, moist thickets, regenerating clearcuts, and willow or alder stands. It often forages low in vegetation. Listen for its song, a series of cheerful "chirry, chirry, chirry, cheat-cheat."
When to spot
Best observed during spring (May-June) and fall (August-September) migration in various scrubby habitats. Also present on breeding grounds in summer.
Where to spot
Breeds in western North America, from Alaska south through the Rocky Mountains to California. Winters in Mexico and Central America.
How to spot
Look in dense, moist thickets, regenerating clearcuts, and willow or alder stands. It often forages low in vegetation. Listen for its song, a series of cheerful "chirry, chirry, chirry, cheat-cheat."
When to spot
Best observed during spring (May-June) and fall (August-September) migration in various scrubby habitats. Also present on breeding grounds in summer.
This warbler is nearly identical in appearance to the Mourning Warbler, especially the duller females and immatures, with the key difference being the presence of an eye-arc in MacGillivray's.
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