Comments: Nesting habitat includes humid coniferous forest (mostly coastal), pine-oak forest and other mixed coniferous-deciduous forests, broadleaf evergreen forest, dense second-growth woodland, and riparian woodlands, often where open areas exist under the canopy of large trees and favoring shady ravines in some areas (AOU 1998, Lowther 2000). In more open and drier habitats on Channel Islands, this flycatcher occurs among eucalyptus shade trees or in oak clumps in canyon bottoms, foraging over coastal scrub and opuntia cactus (Johnson 1980). Nests are placed on cliffs, earth banks, tree branch crotches, or building ledges, or in tree cavities, often along streams or near seeps or springs.
In migration, Pacific-slope flycatchers tend to associate with shady habitats. Wintering occurs in montane evergreen forest, gallery forest, tropical deciduous forest, and tropical lowland evergreen forest (AOU 1998).