BirdAnalyst
BBS Route · California · BCR 32

Red Bluff Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 131 species recorded across 47 survey years, still active.

131Species 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 →
47Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1968–2024Span
10Observers

Bird Species Found on California Red Bluff

Top 40 of 131 species by most recent count. Each links to its species trend.

Species recorded on the Red Bluff 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
Cliff SwallowHirundinidae1212024+108%1970
European StarlingSturnidae952024+141%1970
Acorn WoodpeckerPicidae872024+45%1970
Mourning DoveColumbidae602024-15%1970
Ash-throated FlycatcherTyrannidae442024+27%1970
California QuailOdontophoridae382024+129%1970
Lesser GoldfinchFringillidae332024+192%1970
Cedar WaxwingBombycillidae332024-64%1989
House SparrowPasseridae292024-16%1970
White-faced IbisThreskiornithidae292014+26%2013
Eurasian Collared-DoveColumbidae282024+359%2012
Western MeadowlarkIcteridae262024-45%1970
House FinchFringillidae252024-3%1970
Brown-headed CowbirdIcteridae232024+300%1970
Oak TitmouseParidae202024+38%1970
Brewer's BlackbirdIcteridae192024-46%1970
Lark SparrowPasserellidae192024+9%1970
Northern MockingbirdMimidae18202412×1977
Western KingbirdTyrannidae152024-58%1970
California Scrub-JayCorvidae122024+330%1970
Red-winged BlackbirdIcteridae112024-67%1970
California TowheePasserellidae112024+218%1972
American RobinTurdidae102024+115%1970
Western BluebirdTurdidae102024-51%1970
Tricolored BlackbirdIcteridae92024-9%1972
Turkey VultureCathartidae82024+33%1970
Bewick's WrenTroglodytidae82024-14%1971
Bullock's OrioleIcteridae72024-78%1970
American GoldfinchFringillidae62022+71%1971
Spotted TowheePasserellidae52024+333%1973
Western TanagerCardinalidae52024+275%1994
Lazuli BuntingCardinalidae52024+29%1979
Rufous-crowned SparrowPasserellidae51995n/an/a
Red-tailed HawkAccipitridae42023+50%1970
Nuttall's WoodpeckerPicidae42024-70%1970
Black PhoebeTyrannidae42024+143%1970
Tree SwallowHirundinidae42024-73%1970
White-breasted NuthatchSittidae42024-40%1970
BushtitAegithalidae42023+127%1972
Nashville WarblerParulidae41983n/an/a

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