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BBS Route · California · BCR 5

Navarro Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 119 species recorded across 34 survey years, still active.

119Species 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 →
34Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1972–2011Span
11Observers

Bird Species Found on California Navarro

Top 40 of 119 species by most recent count. Each links to its species trend.

Species recorded on the Navarro 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
Gray FlycatcherTyrannidae531993n/an/a
Steller's JayCorvidae402011+64%1974
Red-winged BlackbirdIcteridae302011+109%1976
Song SparrowPasserellidae292011+177%1974
American RobinTurdidae282011+52%1974
Common RavenCorvidae272011+692%1974
Wilson's WarblerParulidae212011-46%1974
Hermit ThrushTurdidae212011-62%1974
White-crowned SparrowPasserellidae162011+38%1976
Swainson's ThrushTurdidae162011+212%1980
Cliff SwallowHirundinidae132011+54%1978
Violet-green SwallowHirundinidae102011+18%1974
Western GrebePodicipedidae101990n/an/a
Glaucous-winged GullLaridae101995+233%1990
Western BluebirdTurdidae92009+425%1981
Hermit WarblerParulidae92007+114%1988
House FinchFringillidae82009-34%1974
California QuailOdontophoridae72011-50%1976
Common YellowthroatParulidae71992+600%1991
Purple FinchFringillidae62009+25%1976
Pacific WrenTroglodytidae62011+114%1979
Rock PigeonColumbidae52008+200%1982
Mourning DoveColumbidae52011+37%1974
Turkey VultureCathartidae52011+78%1974
European StarlingSturnidae52011+28%1974
Pine SiskinFringillidae52011-28%1978
California TowheePasserellidae52009-23%1974
WrentitSylviidae52011-49%1974
Canada JayCorvidae51973n/an/a
Ruby-crowned KingletRegulidae51993+400%1981
Black-capped ChickadeeParidae51997n/an/a
Purple MartinHirundinidae52011+40%2006
Red-shouldered HawkAccipitridae42011+167%1990
Olive-sided FlycatcherTyrannidae42011+25%1974
Tree SwallowHirundinidae42009+57%1980
Western MeadowlarkIcteridae41974+300%1973
Hairy WoodpeckerPicidae42011+33%1979
Pygmy NuthatchSittidae42011-77%1981
Wild TurkeyPhasianidae42011-19%2000
Mountain QuailOdontophoridae42009+200%2000

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