The Olive-sided Flycatcher's bold 'quick-THREE-beers' song rings from the tops of dead snags in boreal and montane forests. It is the quintessential sentinel bird, sitting conspicuously at the top of the tallest dead tree. White tufts that sometimes protrude from the breast sides are diagnostic. It has declined significantly in recent decades.
Habitat
Boreal and montane conifer forests; forest edges in migration
Diet
Large flying insects caught in aerial sallies from exposed perches
How common
Uncommon
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