BirdAnalyst
BBS Route · California · BCR 32

Hollister 2 Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 92 species recorded across 11 survey years, still active.

92Species 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 →
11Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2012–2024Span
2Observers

Bird Species Found on California Hollister 2

Top 40 of 92 species by most recent count. Each links to its species trend.

Species recorded on the Hollister 2 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
Brewer's BlackbirdIcteridae1182024+29%2014
European StarlingSturnidae752024-39%2014
House FinchFringillidae712024+0%2014
Red-winged BlackbirdIcteridae582024-62%2014
House SparrowPasseridae512024+16%2014
Cliff SwallowHirundinidae432024-74%2014
American CrowCorvidae402024-35%2014
Eurasian Collared-DoveColumbidae402024+3%2014
Northern MockingbirdMimidae292024+91%2014
Mourning DoveColumbidae272024-41%2014
Rock PigeonColumbidae212024+365%2014
Acorn WoodpeckerPicidae182024+413%2014
Barn SwallowHirundinidae182024+3%2014
Common RavenCorvidae182024-14%2015
Turkey VultureCathartidae162024-46%2014
Western MeadowlarkIcteridae162024+39%2014
Black PhoebeTyrannidae152024+59%2014
California Scrub-JayCorvidae122024-19%2014
Cassin's KingbirdTyrannidae112024+200%2018
Western KingbirdTyrannidae92024-51%2014
Tricolored BlackbirdIcteridae92019-87%2016
Song SparrowPasserellidae82024+64%2014
Red-tailed HawkAccipitridae72024-50%2014
California TowheePasserellidae62024+10%2014
Loggerhead ShrikeLaniidae62024+15%2014
Oak TitmouseParidae62024-19%2014
American RobinTurdidae62024-33%2014
Brown-headed CowbirdIcteridae52024-77%2014
Ash-throated FlycatcherTyrannidae42024+233%2014
Lesser GoldfinchFringillidae42024-64%2014
BushtitAegithalidae42022-48%2014
Western TanagerCardinalidae42013n/an/a
California QuailOdontophoridae42024+22%2016
Band-tailed PigeonColumbidae42021n/an/a
Northern HarrierAccipitridae32021+20%2014
Burrowing OwlStrigidae32012n/an/a
White-breasted NuthatchSittidae32024-30%2014
MallardAnatidae32024+167%2017
Tree SwallowHirundinidae32024-50%2015
Great-tailed GrackleIcteridae32018n/an/a

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