BirdAnalyst
BBS Route · California · BCR 15

Riverton Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 111 species recorded across 49 survey years, still active.

111Species 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 →
49Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1973–2023Span
3Observers

Bird Species Found on California Riverton

Top 40 of 111 species by most recent count. Each links to its species trend.

Species recorded on the Riverton 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
Golden-crowned KingletRegulidae302023-10%1977
Red-breasted NuthatchSittidae232023+63%1975
Mountain ChickadeeParidae232023+24%1975
Hermit WarblerParulidae202023+200%1976
Nashville WarblerParulidae192023+33%1975
Warbling VireoVireonidae172023+42%1975
American RobinTurdidae172023-48%1975
Cassin's VireoVireonidae172023+68%1999
Steller's JayCorvidae142023-17%1975
Purple FinchFringillidae132023+87%1975
Western TanagerCardinalidae132023-45%1975
Western Wood-PeweeTyrannidae112023-46%1975
Spotted TowheePasserellidae102023+26%1975
Plumbeous VireoVireonidae101996+67%1975
Black-throated Gray WarblerParulidae92023+50%1976
MacGillivray's WarblerParulidae92023+11%1975
Mountain QuailOdontophoridae82023-66%1975
Hammond's FlycatcherTyrannidae82023+217%1975
Chipping SparrowPasserellidae82023-74%1975
Common RavenCorvidae72022+46%1993
Olive-sided FlycatcherTyrannidae62023-58%1975
Black-headed GrosbeakCardinalidae62023-47%1975
WrentitSylviidae62018+200%1978
Hairy WoodpeckerPicidae52023+175%1975
Red-breasted SapsuckerPicidae52023+50%1975
Brown CreeperCerthiidae52023-49%1975
Fox SparrowPasserellidae42023-11%1975
Band-tailed PigeonColumbidae42023-59%1976
Cassin's FinchFringillidae42022-53%1977
Common MerganserAnatidae42017+300%1980
Brown-headed CowbirdIcteridae32012+183%1975
Lazuli BuntingCardinalidae32023-68%1975
Yellow WarblerParulidae32023-72%1975
Western KingbirdTyrannidae32002+300%1997
Dusky FlycatcherTyrannidae32023-26%1976
Bewick's WrenTroglodytidae32022+0%1977
Evening GrosbeakFringillidae32016-73%1978
European StarlingSturnidae32005+25%1997
Willow FlycatcherTyrannidae21974+100%1973
Green-tailed TowheePasserellidae22023-65%1975

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