BirdAnalyst
BBS Route · California · BCR 15

Lassen Park Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 76 species recorded across 17 survey years, no longer active.

76Species 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 →
17Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1972–1989Span
2Observers

Bird Species Found on California Lassen Park

Top 40 of 76 species by most recent count. Each links to its species trend.

Species recorded on the Lassen Park 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
Red-breasted NuthatchSittidae471989+120%1975
Mountain ChickadeeParidae441989+58%1974
American RobinTurdidae341989-14%1974
Hammond's FlycatcherTyrannidae211989+73%1979
Olive-sided FlycatcherTyrannidae201989+51%1974
White-breasted NuthatchSittidae191977+83%1974
Western Wood-PeweeTyrannidae181989-28%1974
Brown CreeperCerthiidae131989+127%1979
Brewer's BlackbirdIcteridae121987-11%1977
Hermit ThrushTurdidae101989+73%1974
Band-tailed PigeonColumbidae81981+125%1977
Clark's NutcrackerCorvidae81989+100%1977
Purple FinchFringillidae81981-37%1974
Fox SparrowPasserellidae81989+13%1974
Golden-crowned KingletRegulidae71988-36%1982
Dusky FlycatcherTyrannidae71989+143%1985
Steller's JayCorvidae61989-74%1974
Cassin's FinchFringillidae61989+133%1982
MallardAnatidae61989+500%1984
Pine SiskinFringillidae51987+60%1975
Nashville WarblerParulidae51981+400%1978
Common NighthawkCaprimulgidae41988+13%1974
Western TanagerCardinalidae41989-70%1974
Red-breasted SapsuckerPicidae41987-14%1975
House FinchFringillidae41980n/an/a
Black-headed GrosbeakCardinalidae41989-54%1986
White-headed WoodpeckerPicidae31989+14%1974
Chipping SparrowPasserellidae31988-58%1974
Yellow WarblerParulidae31989+67%1974
Mountain QuailOdontophoridae31989-14%1976
Wilson's WarblerParulidae31977-40%1973
Hermit WarblerParulidae21987-60%1974
Red-winged BlackbirdIcteridae21987+33%1977
Swainson's ThrushTurdidae21979+0%1977
Mourning DoveColumbidae21974n/an/a
White-throated SwiftApodidae21981+100%1975
Orange-crowned WarblerParulidae21987+25%1976
American KestrelFalconidae21976n/an/a
Violet-green SwallowHirundinidae21986+100%1976
Great Horned OwlStrigidae21977n/an/a

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