Fairly common in coniferous forests throughout, becoming common in dry-forest zones of Kittitas County and in relatively intact forests of King County foothills. Found to at least 3,000 feet in eastern Cascades, but uncommon in moist, higher-elevation forests west of crest. Prefers fairly open forest with intervening wetlands or clearcuts, but intolerant of large-scale forest fragmentation. Uncommon in residential suburbs of western counties; nearly absent as successful breeder within more densely urbanized areas. Unknown percentage of mapped records reflects migrants and failed breeders, which continue to move throughout summer season.