BirdAnalyst
BBS Route · North Carolina · BCR 27

California Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 97 species recorded across 39 survey years, no longer active.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 →
39Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1972–2013Span
1Observers

Bird Species Found on North Carolina California

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

Species recorded on the California 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
American CrowCorvidae712013+29%1975
Common GrackleIcteridae612013-27%1975
Mourning DoveColumbidae592013+35%1975
Carolina WrenTroglodytidae412013-20%1975
Great Crested FlycatcherTyrannidae402013+98%1975
Red-eyed VireoVireonidae362013-19%1975
Turkey VultureCathartidae312013+331%1975
Northern CardinalCardinalidae312013-23%1975
Barn SwallowHirundinidae292013-25%1975
European StarlingSturnidae282013+11%1975
Pine WarblerParulidae282013-12%1975
Indigo BuntingCardinalidae252013-21%1975
Common YellowthroatParulidae252013-27%1975
Tufted TitmouseParidae252013+65%1975
Black VultureCathartidae242013+162%1980
Summer TanagerCardinalidae232013+92%1975
Purple MartinHirundinidae22201314×1975
Eastern TowheePasserellidae212013-27%1975
OvenbirdParulidae212013-9%1975
Blue GrosbeakCardinalidae202013+208%1975
White-eyed VireoVireonidae182013+106%1975
Prairie WarblerParulidae172013+41%1975
Eastern BluebirdTurdidae172013+275%1975
American RobinTurdidae152013+67%1975
Brown ThrasherMimidae142013+79%1975
Yellow-breasted ChatIcteriidae122013+167%1975
Chimney SwiftApodidae112013-60%1975
Gray CatbirdMimidae112013-38%1975
American GoldfinchFringillidae112013+58%1977
Northern BobwhiteOdontophoridae102013-82%1975
Northern MockingbirdMimidae102013-44%1975
KilldeerCharadriidae102013+700%1984
Fish CrowCorvidae92013-52%1975
Acadian FlycatcherTyrannidae82013-28%1975
Brown-headed CowbirdIcteridae82013-21%1975
Chipping SparrowPasserellidae82013+13%1975
Carolina ChickadeeParidae82013-51%1975
Orchard OrioleIcteridae72013+37%1975
Hooded WarblerParulidae72013-4%1975
House SparrowPasseridae72013-89%1975

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