BirdAnalyst
BBS Route · Washington · BCR 10

Twin Lakes Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 121 species recorded across 33 survey years, still active.

121Species 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 →
33Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1983–2025Span
3Observers

Bird Species Found on Washington Twin Lakes

Top 40 of 121 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
Swainson's ThrushTurdidae422025+97%1985
Red-breasted NuthatchSittidae332025-9%1985
Western TanagerCardinalidae292025+335%1985
Red CrossbillFringillidae262025-12%1986
Pine SiskinFringillidae252025+11%1985
American RobinTurdidae232025-47%1985
Hermit ThrushTurdidae231993+213%1988
VeeryTurdidae202025+0%1985
Warbling VireoVireonidae182025+500%1985
Orange-crowned WarblerParulidae132025+15%1986
Common RavenCorvidae122025-9%1985
Spotted TowheePasserellidae122025+27%1985
Golden-crowned KingletRegulidae122025+178%1990
Townsend's WarblerParulidae122025+23%1988
Yellow WarblerParulidae112025-62%1985
Hammond's FlycatcherTyrannidae92025-56%1985
MacGillivray's WarblerParulidae92025-10%1985
Cassin's VireoVireonidae92025+533%1988
Black-capped ChickadeeParidae82025-51%1985
Cedar WaxwingBombycillidae72025-36%1986
Western Wood-PeweeTyrannidae62025+100%1985
Song SparrowPasserellidae62025-32%1985
Mountain ChickadeeParidae62025-31%1985
Nashville WarblerParulidae62024+11%1988
Cassin's FinchFringillidae52025-21%1985
Black-headed GrosbeakCardinalidae52025+80%1987
Vaux's SwiftApodidae51990n/an/a
Chipping SparrowPasserellidae42025-86%1985
European StarlingSturnidae42022+0%1986
Red-eyed VireoVireonidae42025+20%1986
Hooded MerganserAnatidae41999n/an/a
Calliope HummingbirdTrochilidae31985-67%1983
Cliff SwallowHirundinidae32015+50%1986
Turkey VultureCathartidae22025+100%2003
Hairy WoodpeckerPicidae22025+0%1987
Red-naped SapsuckerPicidae22025-17%1985
Western KingbirdTyrannidae22010+0%1986
Dusky FlycatcherTyrannidae22025-72%1985
Savannah SparrowPasserellidae21983n/an/a
Violet-green SwallowHirundinidae22025+14%1987

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