The Breeding Bird Survey (BBS) is the most reliable indicator of population trends for this species alone, and for the "Western" (Pacific-slope/Cordilleran) Flycatcher complex before the two species were split in the 1980s. In Canada, the majority of records used in the analysis of the complex are Pacific-slope Flycatchers and thus the two results are similar. BBS results indicate a 70% increase in Pacific-slope Flycatcher abundance and an 85% increase in the "Western" Flycatcher complex. Annual indices demonstrate the large fluctuations in the population over the years (see Canada graph below). At the regional level, there are contrasting results between the two Bird Conservation Regions that host the species in Canada and for which there are reasonably reliable results - an increase in the Northern Pacific Rainforest and a substantial decrease in the Great Basin. BBS results at the continental scale show a more moderated trend (little overall change). The Pacific-slope Flycatcher is at an acceptable level relative to its national population goal (see Canada graph below).
Additional information on: Breeding Bird Survey (BBS) - Canadian analysis
