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BBS Route · California · BCR 32

Angelus Oaks Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 90 species recorded across 19 survey years, still active.

90Species 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 →
19Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1989–2017Span
3Observers

Bird Species Found on California Angelus Oaks

Top 40 of 90 species by most recent count. Each links to its species trend.

Species recorded on the Angelus Oaks 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 WoodpeckerPicidae442017+51%1991
White-throated SwiftApodidae262017+12%1993
Spotted TowheePasserellidae222017-5%1991
Mountain ChickadeeParidae212017-12%1991
Cliff SwallowHirundinidae202014+378%2000
Steller's JayCorvidae192017-38%1991
Western Wood-PeweeTyrannidae152017-27%1991
White-breasted NuthatchSittidae132017+367%1991
Costa's HummingbirdTrochilidae132005+550%1993
Lesser GoldfinchFringillidae122017+0%1991
Western TanagerCardinalidae122017+0%1991
Black-headed GrosbeakCardinalidae92017-54%1991
Rufous-crowned SparrowPasserellidae92005+71%2000
Brewer's BlackbirdIcteridae82017-50%1991
Lawrence's GoldfinchFringillidae82005+56%2001
House FinchFringillidae72016-54%1991
Western BluebirdTurdidae72017+26%1991
Band-tailed PigeonColumbidae62017+39%1991
Common RavenCorvidae62017+0%1991
Purple FinchFringillidae62017+60%1993
WrentitSylviidae62017-76%1991
American RobinTurdidae62017-64%1991
Black SwiftApodidae52017-61%1993
Dusky FlycatcherTyrannidae51989n/an/a
Song SparrowPasserellidae52017-81%1991
Mourning DoveColumbidae52016+367%1993
BushtitAegithalidae52016+42%1999
Warbling VireoVireonidae52017+180%2003
Townsend's SolitaireTurdidae52012+200%2003
Ash-throated FlycatcherTyrannidae42017-26%1991
California Scrub-JayCorvidae42017+14%1991
European StarlingSturnidae42004+67%1992
California TowheePasserellidae42017-43%1991
Canyon WrenTroglodytidae42016-14%1992
Nuttall's WoodpeckerPicidae32017+50%1992
Cassin's FinchFringillidae32013+100%1991
House SparrowPasseridae32004-22%2000
Oak TitmouseParidae32017+0%1991
Red-breasted NuthatchSittidae32014+200%1990
Yellow WarblerParulidae32017+0%1999

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