BirdAnalyst
BBS Route · California · BCR 33

Trona Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 26 species recorded across 3 survey years, still active.

26Species 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 →
3Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1977–1997Span
2Observers

Bird Species Found on California Trona

Top 26 of 26 species by most recent count. Each links to its species trend.

Species recorded on the Trona 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
House SparrowPasseridae571997+14%1977
Brown-headed CowbirdIcteridae271977n/an/a
Mourning DoveColumbidae261997+767%1977
Common RavenCorvidae251997+127%1977
European StarlingSturnidae101997+25%1977
Say's PhoebeTyrannidae91997+800%1977
Rock PigeonColumbidae81997n/an/a
House FinchFringillidae71997-42%1977
Horned LarkAlaudidae51997-85%1977
White-throated SwiftApodidae31997n/an/a
Prairie FalconFalconidae21995n/an/a
Western KingbirdTyrannidae21997-33%1995
Yellow-headed BlackbirdIcteridae21995n/an/a
American AvocetRecurvirostridae21997n/an/a
Golden EagleAccipitridae11977n/an/a
Scott's OrioleIcteridae11977n/an/a
Bullock's OrioleIcteridae11997-50%1977
Black-throated SparrowPasserellidae11997-98%1977
Loggerhead ShrikeLaniidae11995-67%1977
Rock WrenTroglodytidae11997+0%1977
ChukarPhasianidae11995n/an/a
Cliff SwallowHirundinidae11995n/an/a
Barn SwallowHirundinidae11997-50%1995
Northern Rough-winged SwallowHirundinidae11995n/an/a
Red-tailed HawkAccipitridae11997n/an/a
Northern MockingbirdMimidae11997n/an/a

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