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BBS Route · California · BCR 5

Alderpoint Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 108 species recorded across 32 survey years, still active.

108Species 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 →
32Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1974–2012Span
9Observers

Bird Species Found on California Alderpoint

Top 40 of 108 species by most recent count. Each links to its species trend.

Species recorded on the Alderpoint 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
Western MeadowlarkIcteridae462012-18%1976
Lazuli BuntingCardinalidae432012+43%1976
Western TanagerCardinalidae412012+17%1976
California Scrub-JayCorvidae382012+433%1976
Spotted TowheePasserellidae342012+159%1976
Brewer's BlackbirdIcteridae33201213×1978
Acorn WoodpeckerPicidae302012-27%1976
Common RavenCorvidae252012+187%1976
Cassin's VireoVireonidae212012-8%1976
Chipping SparrowPasserellidae202012-69%1976
California TowheePasserellidae192012-24%1976
Cliff SwallowHirundinidae192012-56%1976
Steller's JayCorvidae182012+239%1976
Common MerganserAnatidae18200618×1975
Warbling VireoVireonidae162012-67%1976
Grasshopper SparrowPasserellidae162012+360%1988
Lesser GoldfinchFringillidae152012-50%1976
Orange-crowned WarblerParulidae152012+2%1976
Chestnut-backed ChickadeeParidae152012+96%1976
Black-throated Gray WarblerParulidae142012-10%1976
Purple MartinHirundinidae132012+171%1993
Western Wood-PeweeTyrannidae122012-44%1976
Western KingbirdTyrannidae122012+900%1978
European StarlingSturnidae112012+18%1976
Western BluebirdTurdidae112012-12%1976
Eurasian Collared-DoveColumbidae112012+38%2011
American KestrelFalconidae102012+0%1976
Bullock's OrioleIcteridae102012+40%1977
Song SparrowPasserellidae102012+222%1976
American CrowCorvidae92012+5%1976
Lark SparrowPasserellidae92012+100%1977
Hermit WarblerParulidae92012-30%1976
Hutton's VireoVireonidae92012+88%1978
Brown-headed CowbirdIcteridae82012-7%1976
Barn SwallowHirundinidae82012+122%1976
Hermit ThrushTurdidae82012+18%1976
Turkey VultureCathartidae82012-11%1978
Black-headed GrosbeakCardinalidae72012-37%1976
Golden-crowned KingletRegulidae72012+433%1993
White-breasted NuthatchSittidae62012+0%1980

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