BirdAnalyst
BBS Route · California · BCR 9

Bridgeport Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 43 species recorded across 5 survey years, no longer active.

43Species 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 →
5Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1972–1977Span
2Observers

Bird Species Found on California Bridgeport

Top 40 of 43 species by most recent count. Each links to its species trend.

Species recorded on the Bridgeport 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
California GullLaridae2451977+280%1973
Cliff SwallowHirundinidae1611977-35%1973
Brewer's SparrowPasserellidae281977-60%1973
Brewer's BlackbirdIcteridae261977-56%1973
American White PelicanPelecanidae241977n/an/a
Mountain BluebirdTurdidae211973+600%1972
Vesper SparrowPasserellidae171973n/an/a
Pinyon JayCorvidae151974-50%1973
Horned LarkAlaudidae91977-70%1973
American RobinTurdidae91977-50%1973
Red-winged BlackbirdIcteridae61977-38%1973
Green-tailed TowheePasserellidae61977-39%1974
White-crowned SparrowPasserellidae41973+100%1972
Violet-green SwallowHirundinidae41977+13%1973
Sage ThrasherMimidae41977-27%1973
Clark's NutcrackerCorvidae31977-20%1973
Great Horned OwlStrigidae31976n/an/a
Common NighthawkCaprimulgidae31977n/an/a
Black-billed MagpieCorvidae21976-50%1972
Steller's JayCorvidae21977-33%1972
European StarlingSturnidae21974+100%1972
Black-headed GrosbeakCardinalidae21972n/an/a
Red-tailed HawkAccipitridae21977-33%1973
Lesser NighthawkCaprimulgidae21974+0%1973
House SparrowPasseridae21977+100%1973
Turkey VultureCathartidae21974n/an/a
KilldeerCharadriidae11977-71%1973
Mourning DoveColumbidae11974-89%1972
American KestrelFalconidae11977-50%1973
Western MeadowlarkIcteridae11977-75%1972
House FinchFringillidae11974-67%1972
Loggerhead ShrikeLaniidae11974+0%1972
MacGillivray's WarblerParulidae11972n/an/a
Rock WrenTroglodytidae11976-50%1972
Blue-gray GnatcatcherPolioptilidae11973-50%1972
Spotted SandpiperScolopacidae11973n/an/a
Golden EagleAccipitridae11973n/an/a
Red-breasted SapsuckerPicidae11973n/an/a
Rufous-crowned SparrowPasserellidae11973n/an/a
Song SparrowPasserellidae11976-50%1973

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