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BBS Route · California · BCR 32

Caruthers Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 43 species recorded across 15 survey years, still active.

43Species 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 →
15Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1972–1987Span
5Observers

Bird Species Found on California Caruthers

Top 40 of 43 species by most recent count. Each links to its species trend.

Species recorded on the Caruthers 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
House FinchFringillidae1741987-9%1974
Brewer's BlackbirdIcteridae1291987-13%1974
House SparrowPasseridae781987+5%1974
Red-winged BlackbirdIcteridae731987-2%1974
Mourning DoveColumbidae681987-13%1974
American CrowCorvidae64198720×1974
Horned LarkAlaudidae411987-12%1974
Brown-headed CowbirdIcteridae311987+186%1974
American RobinTurdidae281987+46%1974
European StarlingSturnidae231987-11%1974
Western KingbirdTyrannidae161987+41%1974
California Scrub-JayCorvidae111987+77%1975
KilldeerCharadriidae101987-60%1974
Northern MockingbirdMimidae91987-39%1974
Northern PintailAnatidae91973n/an/a
Ring-necked PheasantPhasianidae81987-80%1974
Western MeadowlarkIcteridae61987-84%1974
Barn SwallowHirundinidae61987+8%1976
Black-necked StiltRecurvirostridae51985-20%1974
Tricolored BlackbirdIcteridae41982-52%1977
Bullock's OrioleIcteridae41987-14%1979
Burrowing OwlStrigidae41986+150%1981
Lark SparrowPasserellidae41987+150%1984
Red-tailed HawkAccipitridae31987+67%1977
American KestrelFalconidae31987-21%1975
Cliff SwallowHirundinidae31987+26%1981
Loggerhead ShrikeLaniidae21987+50%1974
Long-billed CurlewScolopacidae21984n/an/a
California QuailOdontophoridae11987-90%1974
Rock PigeonColumbidae11987-66%1974
Northern HarrierAccipitridae11987+50%1975
Great Blue HeronArdeidae11973n/an/a
Song SparrowPasserellidae11982+0%1974
MallardAnatidae11985-75%1975
Cinnamon TealAnatidae11975n/an/a
White-tailed KiteAccipitridae11986+0%1975
Ash-throated FlycatcherTyrannidae11976n/an/a
Northern Rough-winged SwallowHirundinidae11979-67%1976
American GoldfinchFringillidae11987-50%1981
Blue GrosbeakCardinalidae11982n/an/a

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