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BBS Route · California · BCR 32

Green Valley Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 114 species recorded across 24 survey years, still active.

114Species 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 →
24Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1970–2023Span
7Observers

Bird Species Found on California Green Valley

Top 40 of 114 species by most recent count. Each links to its species trend.

Species recorded on the Green Valley 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
Mountain QuailOdontophoridae432023+192%1972
House FinchFringillidae362023-10%1972
American RobinTurdidae332023+37%1972
Steller's JayCorvidae282023-64%1972
Mourning DoveColumbidae242023+71%1972
California Scrub-JayCorvidae202023+33%1972
Spotted TowheePasserellidae192023-6%1972
Black-headed GrosbeakCardinalidae182023+15%1972
Acorn WoodpeckerPicidae142023+47%1972
Anna's HummingbirdTrochilidae142023+20%1977
Mountain ChickadeeParidae132023-74%1972
Cassin's FinchFringillidae112019-42%1972
Black-chinned SparrowPasserellidae112023-77%1972
Western TanagerCardinalidae112023-56%1972
Western MeadowlarkIcteridae102017+108%2013
Western Wood-PeweeTyrannidae82023-70%1972
Northern House WrenTroglodytidae82019+89%1973
White-throated SwiftApodidae82022+450%1977
American CootRallidae82012n/an/a
Western BluebirdTurdidae72023-13%1972
Band-tailed PigeonColumbidae62023-8%1972
California TowheePasserellidae62023+117%1975
Lazuli BuntingCardinalidae62023+220%1991
MallardAnatidae62023+7%2016
Olive-sided FlycatcherTyrannidae52023-61%1972
Green-tailed TowheePasserellidae52022-57%1972
White-breasted NuthatchSittidae52023-62%1972
Pygmy NuthatchSittidae52023-59%1972
Bullock's OrioleIcteridae52023+150%1975
California ThrasherMimidae52023+67%1988
California QuailOdontophoridae52019+111%1997
Say's PhoebeTyrannidae42022+80%2002
Lawrence's GoldfinchFringillidae42014+340%1972
Black-throated SparrowPasserellidae42023-65%1972
WrentitSylviidae42022+343%1972
Common RavenCorvidae42023+263%1988
Bewick's WrenTroglodytidae42023+55%1974
Loggerhead ShrikeLaniidae42017+133%2002
European StarlingSturnidae42002+343%1991
American CrowCorvidae42017-50%2013

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