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BBS Route · California · BCR 32

Gravesboro Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 68 species recorded across 23 survey years, no longer active.

68Species 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 →
23Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1968–1995Span
5Observers

Bird Species Found on California Gravesboro

Top 40 of 68 species by most recent count. Each links to its species trend.

Species recorded on the Gravesboro 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 StarlingSturnidae1671995+280%1970
Brewer's BlackbirdIcteridae1251995+32%1970
House FinchFringillidae1211995+13%1970
Cliff SwallowHirundinidae1181995+79%1970
House SparrowPasseridae1111995-22%1970
Rock PigeonColumbidae741995+167%1970
American CrowCorvidae621995+322%1971
California Scrub-JayCorvidae611995+424%1970
Northern MockingbirdMimidae381995-12%1970
American RobinTurdidae331995+116%1970
Mourning DoveColumbidae321995-47%1970
Red-winged BlackbirdIcteridae221995-82%1970
Lesser GoldfinchFringillidae151995-55%1983
MallardAnatidae121995-13%1970
California QuailOdontophoridae121995-39%1970
KilldeerCharadriidae81995+54%1970
Western KingbirdTyrannidae71995+71%1970
Brown-headed CowbirdIcteridae71995+24%1970
Tricolored BlackbirdIcteridae71991-90%1970
Tree SwallowHirundinidae71995+250%1979
Acorn WoodpeckerPicidae51995-44%1970
Western MeadowlarkIcteridae51995-7%1970
Barn SwallowHirundinidae51995+67%1971
Black-headed GrosbeakCardinalidae41979-25%1971
Common GallinuleRallidae41971+100%1969
Red-tailed HawkAccipitridae41995+71%1973
Oak TitmouseParidae41977+300%1973
Ring-necked PheasantPhasianidae31995+0%1970
American KestrelFalconidae31995-53%1970
Spotted TowheePasserellidae31995+133%1975
Bullock's OrioleIcteridae21991-50%1970
White-tailed KiteAccipitridae21995+67%1971
Red-shouldered HawkAccipitridae21995-20%1972
Loggerhead ShrikeLaniidae21991+50%1974
Lark SparrowPasserellidae21979-50%1972
Band-tailed PigeonColumbidae21974+0%1973
Black-chinned HummingbirdTrochilidae21986+100%1975
Ash-throated FlycatcherTyrannidae21979n/an/a
Great EgretArdeidae21995+0%1987
Savannah SparrowPasserellidae21991n/an/a

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