BirdAnalyst
BBS Route · Washington · BCR 10

Twin Lakes Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 120 species recorded across 32 survey years, still active.

120Species 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 →
32Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1983–2024Span
3Observers

Bird Species Found on Washington Twin Lakes

Top 40 of 120 species by most recent count. Each links to its species trend.

Species recorded on the Twin Lakes 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
Pine SiskinFringillidae522024-9%1985
Swainson's ThrushTurdidae362024+60%1985
Red-breasted NuthatchSittidae292024-33%1985
Western TanagerCardinalidae242024+345%1985
Hermit ThrushTurdidae231993+213%1988
Warbling VireoVireonidae182024+456%1985
American RobinTurdidae132024-45%1985
Mountain ChickadeeParidae122024-29%1985
Chipping SparrowPasserellidae112024-86%1985
VeeryTurdidae112024-20%1985
Golden-crowned KingletRegulidae112024+56%1990
Townsend's WarblerParulidae112024+55%1988
Spotted TowheePasserellidae102024+18%1985
Song SparrowPasserellidae92024-24%1985
Yellow WarblerParulidae92024-60%1985
Common RavenCorvidae82024-32%1985
MacGillivray's WarblerParulidae82024-5%1985
Orange-crowned WarblerParulidae72024-35%1986
Western Wood-PeweeTyrannidae62024+86%1985
Red-eyed VireoVireonidae62024-10%1986
Nashville WarblerParulidae62024+11%1988
Cassin's FinchFringillidae52024-43%1985
Black-capped ChickadeeParidae52024-59%1985
Vaux's SwiftApodidae51990n/an/a
Dusky FlycatcherTyrannidae42024-44%1985
European StarlingSturnidae42022+0%1986
Brown-headed CowbirdIcteridae42024-53%1986
Cassin's VireoVireonidae42024+333%1988
Hooded MerganserAnatidae41999n/an/a
Calliope HummingbirdTrochilidae31985-67%1983
Hammond's FlycatcherTyrannidae32024-61%1985
Cliff SwallowHirundinidae32015+50%1986
Tree SwallowHirundinidae32024-57%1986
Violet-green SwallowHirundinidae32022+0%1987
KilldeerCharadriidae32024-29%1986
Common YellowthroatParulidae32022+125%2006
Turkey VultureCathartidae22024+67%2003
Western KingbirdTyrannidae22010+0%1986
Steller's JayCorvidae22022-55%1985
Red CrossbillFringillidae22024-46%1986

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