BirdAnalyst
BBS Route · California · BCR 32

Tehama Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 123 species recorded across 39 survey years, still active.

123Species 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 →
1973–2022Span
6Observers

Bird Species Found on California Tehama

Top 40 of 123 species by most recent count. Each links to its species trend.

Species recorded on the Tehama 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
Acorn WoodpeckerPicidae522022+240%1975
California QuailOdontophoridae492022+132%1975
California Scrub-JayCorvidae332022+162%1975
Ash-throated FlycatcherTyrannidae222022+15%1975
Purple FinchFringillidae182022+221%1975
White-breasted NuthatchSittidae182022+42%1975
Steller's JayCorvidae152022+18%1975
WrentitSylviidae152022+67%1975
Western Wood-PeweeTyrannidae112022-59%1975
Western TanagerCardinalidae102022+55%1975
Black-headed GrosbeakCardinalidae82022-36%1975
American RobinTurdidae82022-32%1975
Tree SwallowHirundinidae62005+0%1983
House SparrowPasseridae62014+100%1986
Mountain QuailOdontophoridae52022+7%1975
Spotted TowheePasserellidae52022-41%1975
Oak TitmouseParidae52022-26%1975
Blue-gray GnatcatcherPolioptilidae52022+18%1975
Red-breasted NuthatchSittidae52022-24%1976
Hutton's VireoVireonidae52022+50%1977
Pygmy NuthatchSittidae51992n/an/a
Mourning DoveColumbidae42022+12%1975
Violet-green SwallowHirundinidae42019-73%1975
Cassin's VireoVireonidae42022+86%1975
Black-throated Gray WarblerParulidae42022-7%1975
Bewick's WrenTroglodytidae42022-71%1975
Anna's HummingbirdTrochilidae42022+120%1978
Common RavenCorvidae42022+80%1988
KilldeerCharadriidae32012-55%1975
House FinchFringillidae32021-64%1975
Lesser GoldfinchFringillidae32014-73%1975
Chipping SparrowPasserellidae32019-78%1975
Western BluebirdTurdidae32022-71%1975
American CootRallidae31997+25%1976
Lazuli BuntingCardinalidae32022-36%1976
Black PhoebeTyrannidae32022+167%1978
Hairy WoodpeckerPicidae32021+125%1981
Chestnut-backed ChickadeeParidae31981+200%1977
American GoldfinchFringillidae32005-17%1995
Nuttall's WoodpeckerPicidae22022+33%1975

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