BirdAnalyst
BBS Route · California · BCR 9

Likely Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 167 species recorded across 44 survey years, still active.

167Species 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 →
1971–2025Span
13Observers

Bird Species Found on California Likely

Top 40 of 167 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
Red-winged BlackbirdIcteridae4852025+69%1973
Brewer's BlackbirdIcteridae4302025+72%1973
Ring-billed GullLaridae3622025+705%1975
Cliff SwallowHirundinidae972025+40%1973
White-faced IbisThreskiornithidae782025+41%1995
Barn SwallowHirundinidae712025-25%1973
California GullLaridae582017+669%1981
Black-necked StiltRecurvirostridae57202514×1988
GadwallAnatidae42202520×1980
MallardAnatidae35202536×1974
Western MeadowlarkIcteridae342025-10%1973
Brown-headed CowbirdIcteridae312025+142%1974
KilldeerCharadriidae292025+16%1973
House FinchFringillidae252025-54%1974
Sandhill CraneGruidae232025+200%1973
Western Wood-PeweeTyrannidae222025+450%1974
American CootRallidae202025+539%1987
Wilson's SnipeScolopacidae192025+29%1973
European StarlingSturnidae192025+168%1975
American White PelicanPelecanidae182019+85%1988
Common RavenCorvidae16202512×1984
Mourning DoveColumbidae152025+90%1973
Horned LarkAlaudidae152025+13%1973
Red-tailed HawkAccipitridae142025+490%1973
Western KingbirdTyrannidae142025+282%1973
Yellow-headed BlackbirdIcteridae142025-16%1973
Eurasian Collared-DoveColumbidae132025+14%2014
Rock PigeonColumbidae112024+400%1996
Marsh WrenTroglodytidae112025+38%1976
CanvasbackAnatidae102015+900%1973
Cinnamon TealAnatidae102025+35%1976
Tree SwallowHirundinidae102025-28%1982
Northern Rough-winged SwallowHirundinidae92025+60%1974
American RobinTurdidae82025+0%1973
Black-billed MagpieCorvidae72025-69%1973
Song SparrowPasserellidae72025-79%1973
Ruddy DuckAnatidae72025+225%2009
House SparrowPasseridae62025-74%1974
BushtitAegithalidae61995+200%1972
California QuailOdontophoridae62025+38%1980

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14. A route is a sample, not a census.