BirdAnalyst
BBS Route · Washington · BCR 9

Blewett Pass Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 87 species recorded across 25 survey years, still active.

87Species 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 →
25Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1992–2024Span
3Observers

Bird Species Found on Washington Blewett Pass

Top 40 of 87 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 TanagerCardinalidae1012024+385%1996
Townsend's WarblerParulidae872024+116%1996
Hermit ThrushTurdidae692024+186%1996
Warbling VireoVireonidae562024+720%1997
Dusky FlycatcherTyrannidae392024+70%1996
Swainson's ThrushTurdidae322024+90%1997
Pine SiskinFringillidae252024+217%1997
MacGillivray's WarblerParulidae252024+225%1996
Hammond's FlycatcherTyrannidae242024+335%1996
Chipping SparrowPasserellidae212024+58%1996
American RobinTurdidae212024+20%1996
Red-breasted NuthatchSittidae182024-53%1996
Black-headed GrosbeakCardinalidae172024+550%2004
Golden-crowned KingletRegulidae152024+45%1996
VeeryTurdidae132024+125%1997
Yellow WarblerParulidae112024+186%2005
Cassin's FinchFringillidae102024+126%1996
Purple FinchFringillidae82024+171%2007
Red CrossbillFringillidae72022-10%1996
Violet-green SwallowHirundinidae72024+88%2012
Western Wood-PeweeTyrannidae62024-4%1996
Northern House WrenTroglodytidae62024+143%1997
White-crowned SparrowPasserellidae62024+467%2006
Lazuli BuntingCardinalidae62017+125%2007
Williamson's SapsuckerPicidae52024+33%1996
Nashville WarblerParulidae52024+80%1996
Mountain ChickadeeParidae52024-76%1996
Common RavenCorvidae42024-44%1996
California QuailOdontophoridae42024+17%2010
Cedar WaxwingBombycillidae32019+100%1997
Cassin's VireoVireonidae32024+0%1996
Turkey VultureCathartidae32019+275%2008
White-breasted NuthatchSittidae32022-50%2004
Black-backed WoodpeckerPicidae32023+67%2009
Common NighthawkCaprimulgidae22012-33%1996
Rufous HummingbirdTrochilidae22024+0%1996
Steller's JayCorvidae22022-79%1996
Canada JayCorvidae22024+0%2007
Evening GrosbeakFringillidae22022+113%1998
Song SparrowPasserellidae22024+11%1996

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.