BirdAnalyst
BBS Route · California · BCR 9

Likely Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 163 species recorded across 43 survey years, still active.

163Species 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 →
43Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1971–2024Span
13Observers

Bird Species Found on California Likely

Top 40 of 163 species by most recent count. Each links to its species trend.

Species recorded on the Likely 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
Brewer's BlackbirdIcteridae5072024+19%1973
Ring-billed GullLaridae2302024+242%1975
European StarlingSturnidae2062024+283%1975
Red-winged BlackbirdIcteridae1582024+12%1973
MallardAnatidae157202436×1974
White-faced IbisThreskiornithidae1222024-3%1995
Cliff SwallowHirundinidae1212024+55%1973
American CootRallidae922024+439%1987
Barn SwallowHirundinidae902024-41%1973
GadwallAnatidae73202420×1980
California GullLaridae582017+669%1981
Western MeadowlarkIcteridae382024-18%1973
Mourning DoveColumbidae312024+52%1973
KilldeerCharadriidae252024-16%1973
Canada GooseAnatidae252024+42%1979
Black-necked StiltRecurvirostridae242024+417%1988
Red-tailed HawkAccipitridae192024+510%1973
House FinchFringillidae192024-72%1974
Common RavenCorvidae19202415×1984
Horned LarkAlaudidae182024-9%1973
American White PelicanPelecanidae182019+85%1988
American AvocetRecurvirostridae182024-51%1995
Ring-necked DuckAnatidae182024+217%2014
American RobinTurdidae172024+6%1973
Western Wood-PeweeTyrannidae172024+213%1974
Yellow-headed BlackbirdIcteridae162024-33%1973
Western KingbirdTyrannidae152024+236%1973
Savannah SparrowPasserellidae152024+110%1974
Rock WrenTroglodytidae152024+633%1982
Ruddy DuckAnatidae152024+213%2009
Brown-headed CowbirdIcteridae142024+11%1974
Great EgretArdeidae142024+129%1995
Wilson's SnipeScolopacidae122024+21%1973
Cinnamon TealAnatidae122024-12%1976
Rock PigeonColumbidae112024+400%1996
Violet-green SwallowHirundinidae112019+400%1983
CanvasbackAnatidae102015+900%1973
Black-billed MagpieCorvidae92024-52%1973
House SparrowPasseridae92024-72%1974
Eurasian Collared-DoveColumbidae92024+32%2014

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