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BBS Route · California · BCR 32

Hollister Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 97 species recorded across 31 survey years, no longer active.

97Species 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 →
31Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1973–2011Span
4Observers

Bird Species Found on California Hollister

Top 40 of 97 species by most recent count. Each links to its species trend.

Species recorded on the Hollister 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
European StarlingSturnidae1812011+940%1975
Red-winged BlackbirdIcteridae1462011+70%1975
Brewer's BlackbirdIcteridae1202011+28%1975
Cliff SwallowHirundinidae1022011+938%1975
Rock PigeonColumbidae612011+184%1975
House FinchFringillidae572011-34%1975
Canada GooseAnatidae44200715×1993
Eurasian Collared-DoveColumbidae382011+111%2007
American CrowCorvidae36201119×1975
Mourning DoveColumbidae342011+50%1975
House SparrowPasseridae342011+42%1975
Horned LarkAlaudidae272007+413%1983
Brown-headed CowbirdIcteridae202011+200%1978
Red-tailed HawkAccipitridae142011+429%1976
Common RavenCorvidae142011+260%1997
American AvocetRecurvirostridae132007+275%1992
Western KingbirdTyrannidae122011+46%1975
Tricolored BlackbirdIcteridae122007-12%1982
Barn SwallowHirundinidae112011+70%1975
Northern MockingbirdMimidae112011+317%1975
Turkey VultureCathartidae102011+375%1975
Great Blue HeronArdeidae102007+383%1982
Song SparrowPasserellidae82011+150%1975
Bullock's OrioleIcteridae82007-30%1978
Double-crested CormorantPhalacrocoracidae72007+73%1997
American KestrelFalconidae62011+167%1975
Burrowing OwlStrigidae62007+33%1980
American GoldfinchFringillidae62011+22%1980
Western BluebirdTurdidae62005+50%1986
Western MeadowlarkIcteridae52011-74%1975
Loggerhead ShrikeLaniidae52011+23%1976
MallardAnatidae5201140×1980
California TowheePasserellidae52007+225%1981
KilldeerCharadriidae42011+27%1976
Northern HarrierAccipitridae42007+0%1980
Black PhoebeTyrannidae42011+350%1980
California Scrub-JayCorvidae42011+375%1981
Oak TitmouseParidae42011+133%1980
Great Horned OwlStrigidae31997+43%1983
American RobinTurdidae32011+17%1978

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