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BBS Route · California · BCR 32

Arvin Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 80 species recorded across 32 survey years, still active.

80Species 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 →
1971–2022Span
4Observers

Bird Species Found on California Arvin

Top 40 of 80 species by most recent count. Each links to its species trend.

Species recorded on the Arvin 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
Violet-green SwallowHirundinidae1721988+330%1982
White-faced IbisThreskiornithidae1502022+153%2013
Yellow-headed BlackbirdIcteridae382015-19%1979
House FinchFringillidae382022-66%1973
Brewer's BlackbirdIcteridae352022-49%1973
Tricolored BlackbirdIcteridae312022-25%1973
Double-crested CormorantPhalacrocoracidae272021-30%2015
Mourning DoveColumbidae222022+36%1973
Song SparrowPasserellidae202022+391%1973
House SparrowPasseridae202022-94%1973
Common RavenCorvidae16202215×1981
American CrowCorvidae152022+867%1989
Western Cattle-EgretArdeidae132015-59%1989
Anna's HummingbirdTrochilidae82019+150%1981
American White PelicanPelecanidae82017-33%2013
Cinnamon TealAnatidae71999+8%1973
KilldeerCharadriidae72022-36%1973
Red-winged BlackbirdIcteridae72022-92%1973
MallardAnatidae62019+520%1979
Lawrence's GoldfinchFringillidae62015+71%1986
Lark SparrowPasserellidae52016+11%1973
Northern MockingbirdMimidae52022-9%1973
Rock PigeonColumbidae42019+20%1973
Turkey VultureCathartidae42019-36%1979
Spotted DoveColumbidae42012+100%1984
Burrowing OwlStrigidae32016+25%1985
European StarlingSturnidae32016-60%1973
American RobinTurdidae32022-90%1973
American AvocetRecurvirostridae31996+371%1982
Northern Rough-winged SwallowHirundinidae31984-25%1978
Northern House WrenTroglodytidae31985n/an/a
Great Blue HeronArdeidae32021+25%2012
Bullock's OrioleIcteridae22021-70%1973
Black-headed GrosbeakCardinalidae21995-44%1973
Cliff SwallowHirundinidae22021+75%1978
American GoldfinchFringillidae21982+0%1972
Belted KingfisherAlcedinidae21981n/an/a
Northern PintailAnatidae21996-20%1986
Marsh WrenTroglodytidae21988+0%1982
Black-crowned Night HeronArdeidae22016-33%1988

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