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BBS Route · California · BCR 5

Holmes Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 114 species recorded across 50 survey years, still active.

114Species 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 →
50Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1968–2025Span
7Observers

Bird Species Found on California Holmes

Top 40 of 114 species by most recent count. Each links to its species trend.

Species recorded on the Holmes 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
Swainson's ThrushTurdidae332025-34%1970
Chestnut-backed ChickadeeParidae272025-48%1970
Black SwiftApodidae251999n/an/a
Song SparrowPasserellidae232025-41%1970
European StarlingSturnidae212021+410%1975
Steller's JayCorvidae182025-18%1970
Common RavenCorvidae132025-36%1970
Brown CreeperCerthiidae132025+290%1972
Hermit ThrushTurdidae132025-6%1971
Spotted TowheePasserellidae122025-33%1970
Lazuli BuntingCardinalidae122025+75%1970
Warbling VireoVireonidae122025-59%1970
American RobinTurdidae122025-31%1970
Western TanagerCardinalidae112025-3%1970
Pacific WrenTroglodytidae112025+39%1970
Golden-crowned KingletRegulidae102025+94%1970
Black-headed GrosbeakCardinalidae92024-53%1970
Wilson's WarblerParulidae92025-85%1970
Varied ThrushTurdidae92025+0%1970
Red-breasted NuthatchSittidae82025+167%1972
Purple MartinHirundinidae82013-38%1973
Hermit WarblerParulidae72025-40%1970
WrentitSylviidae72025-18%1970
Tree SwallowHirundinidae72025-11%1971
Purple FinchFringillidae62025-30%1970
Violet-green SwallowHirundinidae62024+271%1973
Black-throated Gray WarblerParulidae52025-38%1970
Yellow-breasted ChatIcteriidae52025+160%1972
Rock PigeonColumbidae52012n/an/a
California QuailOdontophoridae42025-72%1970
Pine SiskinFringillidae42007-38%1972
Red-winged BlackbirdIcteridae41971+100%1969
American GoldfinchFringillidae42024-42%1972
Brewer's BlackbirdIcteridae42023-20%1973
Cassin's VireoVireonidae42025+5%1976
California Scrub-JayCorvidae32025-56%1970
Northern Rough-winged SwallowHirundinidae32022-56%1972
Cedar WaxwingBombycillidae32025+33%1979
Marbled MurreletAlcidae32025-13%1995
Grasshopper SparrowPasserellidae32008+0%1997

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14. A route is a sample, not a census.