MacGillivray’s Warbler is a secretive inhabitant of dense mountain thickets and riparian undergrowth. Males show a dark gray hood and white eye crescents, while females are duller olive-gray. In Arizona, it breeds in moist mountain canyons, especially where streamside vegetation is thick. It walks along branches and stems, flicking its tail as it searches for insects. The bubbling, musical song of MacGillivray’s is a common sound in shaded forest glades during summer, and the species migrates south to Central America for the winter.
