BirdAnalyst
BBS Route · California · BCR 32

Mt Baldy Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 99 species recorded across 37 survey years, still active.

99Species 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 →
37Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1970–2024Span
5Observers

Bird Species Found on California Mt Baldy

Top 40 of 99 species by most recent count. Each links to its species trend.

Species recorded on the Mt Baldy 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
Spotted TowheePasserellidae902024-23%1972
Mountain QuailOdontophoridae852024+108%1972
WrentitSylviidae742024+13%1972
Black-headed GrosbeakCardinalidae692024-47%1972
California TowheePasserellidae332024-69%1972
California Scrub-JayCorvidae282024-1%1972
Ash-throated FlycatcherTyrannidae272024+37%1972
Bewick's WrenTroglodytidae212024-63%1972
House FinchFringillidae192024-61%1972
California ThrasherMimidae182024-30%1972
Band-tailed PigeonColumbidae162024+125%1972
Western TanagerCardinalidae152024-4%1972
Northern House WrenTroglodytidae132024-17%1972
Acorn WoodpeckerPicidae102024+171%1976
Common RavenCorvidae92024+380%1977
California QuailOdontophoridae82024+775%1972
Anna's HummingbirdTrochilidae82024+8%1972
Lesser GoldfinchFringillidae82024-43%1972
Lazuli BuntingCardinalidae72024-69%1972
BushtitAegithalidae72022-88%1972
Steller's JayCorvidae62024-57%1972
Oak TitmouseParidae62024-18%1972
ChukarPhasianidae62018n/an/a
Mourning DoveColumbidae52024-42%1972
Purple FinchFringillidae52024-27%1972
Lawrence's GoldfinchFringillidae51996+60%1972
Warbling VireoVireonidae52024+267%1997
Blue-gray GnatcatcherPolioptilidae52024+100%1980
White-throated SwiftApodidae42024-84%1972
Orange-crowned WarblerParulidae42024-68%1972
Canyon WrenTroglodytidae42024+133%1981
Nuttall's WoodpeckerPicidae32024+71%1972
Song SparrowPasserellidae32024+0%1972
Cliff SwallowHirundinidae32023-85%1972
House SparrowPasseridae32001+14%1973
Common PoorwillCaprimulgidae32024+125%1995
Brown-headed CowbirdIcteridae22021-80%1972
Violet-green SwallowHirundinidae22024-74%1972
Mountain ChickadeeParidae22024+0%1975
Black-tailed GnatcatcherPolioptilidae21980-53%1973

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