BirdAnalyst
BBS Route · California · BCR 32

Red Bluff Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 131 species recorded across 48 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 →
48Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1968–2025Span
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
European StarlingSturnidae1012025+171%1970
Acorn WoodpeckerPicidae782025+38%1970
Ash-throated FlycatcherTyrannidae502025+32%1970
Mourning DoveColumbidae482025-11%1970
Western KingbirdTyrannidae372025-45%1970
Cliff SwallowHirundinidae352025+15%1970
Canada GooseAnatidae342025+185%1994
House SparrowPasseridae322025-10%1970
White-faced IbisThreskiornithidae292014+26%2013
California QuailOdontophoridae262025+116%1970
House FinchFringillidae242025-17%1970
Eurasian Collared-DoveColumbidae242025+359%2012
Lesser GoldfinchFringillidae232025+165%1970
Oak TitmouseParidae232025+35%1970
Northern MockingbirdMimidae182025+960%1977
Brewer's BlackbirdIcteridae172025-48%1970
California TowheePasserellidae172025+255%1972
Turkey VultureCathartidae152025+61%1970
California Scrub-JayCorvidae152025+290%1970
White-breasted NuthatchSittidae152025-45%1970
Red-winged BlackbirdIcteridae132025-70%1970
Western MeadowlarkIcteridae122025-56%1970
Bullock's OrioleIcteridae122025-74%1970
Cedar WaxwingBombycillidae112025-56%1989
Western BluebirdTurdidae92025-51%1970
Tricolored BlackbirdIcteridae92024-9%1972
Black PhoebeTyrannidae82025+171%1970
Brown-headed CowbirdIcteridae72025+257%1970
American RobinTurdidae72025+108%1970
KilldeerCharadriidae52025-70%1970
Lark SparrowPasserellidae52025-32%1970
Spotted TowheePasserellidae52025+367%1973
Bewick's WrenTroglodytidae52025+14%1971
Rufous-crowned SparrowPasserellidae51995n/an/a
Nuttall's WoodpeckerPicidae42024-70%1970
American GoldfinchFringillidae42025+50%1971
Wilson's WarblerParulidae42025+57%1990
Hairy WoodpeckerPicidae42025+150%1979
Nashville WarblerParulidae41983n/an/a
Vaux's SwiftApodidae42011+33%1994

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