BirdAnalyst
BBS Route · Washington · BCR 9

Blewett Pass Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 89 species recorded across 26 survey years, still active.

89Species RecordedSpecies recordedDistinct species detected on standard-protocol BBS runs here across all years on record — a measure of survey breadth, not a complete checklist.Full methodology →
26Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1992–2025Span
3Observers

Bird Species Found on Washington Blewett Pass

Top 40 of 89 species by most recent count. Each links to its species trend.

Species recorded on the Blewett Pass route.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →Baseline yearThe first year of the smoothed window the trend is measured from. An earlier baseline means a longer record stands behind the number.Full methodology →History
Western TanagerCardinalidae962025+430%1996
Hermit ThrushTurdidae652025+235%1996
Townsend's WarblerParulidae632025+102%1996
Pine SiskinFringillidae552025+583%1997
Hammond's FlycatcherTyrannidae462025+471%1996
Red-breasted NuthatchSittidae442025-32%1996
Chipping SparrowPasserellidae322025+83%1996
Cassin's FinchFringillidae302025+168%1996
MacGillivray's WarblerParulidae282025+203%1996
Black-headed GrosbeakCardinalidae282025+713%2004
Warbling VireoVireonidae252025+605%1997
Swainson's ThrushTurdidae142025+60%1997
Dusky FlycatcherTyrannidae122025+43%1996
VeeryTurdidae122025+183%1997
Western Wood-PeweeTyrannidae102025-31%1996
American RobinTurdidae102025+0%1996
Mountain ChickadeeParidae92025-73%1996
Williamson's SapsuckerPicidae82025+89%1996
Common RavenCorvidae72025-39%1996
Song SparrowPasserellidae72025+22%1996
Yellow WarblerParulidae72025+171%2005
Violet-green SwallowHirundinidae72024+88%2012
Canada JayCorvidae62025+83%2007
Northern House WrenTroglodytidae62024+143%1997
Lazuli BuntingCardinalidae62017+125%2007
Evening GrosbeakFringillidae52025+63%1998
Spotted TowheePasserellidae52025+150%1997
Cassin's VireoVireonidae42025-21%1996
California QuailOdontophoridae42024+17%2010
Varied ThrushTurdidae42025n/an/a
Steller's JayCorvidae32025-75%1996
Cedar WaxwingBombycillidae32019+100%1997
Golden-crowned KingletRegulidae32025-24%1996
Turkey VultureCathartidae32019+275%2008
Purple FinchFringillidae32025+171%2007
White-breasted NuthatchSittidae32022-50%2004
Black-backed WoodpeckerPicidae32023+67%2009
Common NighthawkCaprimulgidae22012-33%1996
Rufous HummingbirdTrochilidae22024+0%1996
Northern Rough-winged SwallowHirundinidae22023+80%1998

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14. A route is a sample, not a census.