BirdAnalyst
BBS Route · California · BCR 33

Pearblossom Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 97 species recorded across 44 survey years, still active.

97Species 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 →
44Years 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
7Observers

Bird Species Found on California Pearblossom

Top 40 of 97 species by most recent count. Each links to its species trend.

Species recorded on the Pearblossom 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
House FinchFringillidae422024-59%1972
House SparrowPasseridae312024+48%1973
Red-winged BlackbirdIcteridae262024+318%1973
Common RavenCorvidae242024+285%1972
Mourning DoveColumbidae232024-52%1972
PhainopeplaPtiliogonatidae202019+44%1977
California QuailOdontophoridae192024-18%1972
Cliff SwallowHirundinidae15201912×2009
Northern MockingbirdMimidae142024-36%1972
Black-throated SparrowPasserellidae132024-85%1972
Ash-throated FlycatcherTyrannidae122024+47%1972
Bewick's WrenTroglodytidae122024-10%1972
BushtitAegithalidae82024+69%1972
Western KingbirdTyrannidae72024-31%1973
Anna's HummingbirdTrochilidae72019+133%2012
Horned LarkAlaudidae62024-76%1972
California Scrub-JayCorvidae62024-33%1972
European StarlingSturnidae62024+630%1972
Lesser GoldfinchFringillidae62024+71%1977
Cactus WrenTroglodytidae52024-72%1972
VerdinRemizidae52024-47%1989
Rock WrenTroglodytidae52024+150%1974
Great-tailed GrackleIcteridae42024-50%2006
Eurasian Collared-DoveColumbidae42024+36%2009
American KestrelFalconidae32024+167%1976
Brown-headed CowbirdIcteridae32024+0%1972
Scott's OrioleIcteridae32024-83%1972
Northern House WrenTroglodytidae32024-17%1973
Oak TitmouseParidae32015+17%1974
Red-tailed HawkAccipitridae32024-42%1975
Western Wood-PeweeTyrannidae32024+20%1977
Rock PigeonColumbidae32019-83%1985
Violet-green SwallowHirundinidae32016+150%2009
Yellow-headed BlackbirdIcteridae32024+0%2008
Western MeadowlarkIcteridae22024+71%1972
Brewer's BlackbirdIcteridae22024+114%1976
Black-chinned SparrowPasserellidae22024+0%1977
Spotted TowheePasserellidae22016-14%1972
California TowheePasserellidae22024+100%1975
Loggerhead ShrikeLaniidae22024-76%1972

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