BirdAnalyst
BBS Route · California · BCR 32

Folsom Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 113 species recorded across 40 survey years, still active.

113Species 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 →
40Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1984–2024Span
1Observers

Bird Species Found on California Folsom

Top 40 of 113 species by most recent count. Each links to its species trend.

Species recorded on the Folsom 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 FinchFringillidae692024+59%1986
Lesser GoldfinchFringillidae562024-22%1986
European StarlingSturnidae422024-44%1986
Ash-throated FlycatcherTyrannidae372024+3%1986
Rock PigeonColumbidae362008+47%1988
Mourning DoveColumbidae322024-14%1986
WrentitSylviidae312024-26%1986
Spotted TowheePasserellidae302024-33%1986
Acorn WoodpeckerPicidae262024+129%1986
California TowheePasserellidae232024+14%1986
Oak TitmouseParidae222024-30%1986
Orange-crowned WarblerParulidae212024-34%1986
California QuailOdontophoridae192024+135%1986
Red-winged BlackbirdIcteridae172024+0%1986
Violet-green SwallowHirundinidae172024+95%1986
Northern MockingbirdMimidae162024+256%1986
California Scrub-JayCorvidae152024-47%1986
Black-headed GrosbeakCardinalidae142024-61%1986
Nuttall's WoodpeckerPicidae132024-38%1986
White-breasted NuthatchSittidae132024-16%1986
Western KingbirdTyrannidae102024-62%1986
Bullock's OrioleIcteridae102024-75%1986
Bewick's WrenTroglodytidae102024-76%1986
American RobinTurdidae92024-39%1986
Turkey VultureCathartidae82024+59%1986
Anna's HummingbirdTrochilidae82024+5%1986
Brown-headed CowbirdIcteridae82024-85%1986
Northern House WrenTroglodytidae72024-60%1986
Western BluebirdTurdidae72024-14%1986
Wild TurkeyPhasianidae72024+440%1989
California ThrasherMimidae62024-59%1986
BushtitAegithalidae62024-28%1986
Yellow-breasted ChatIcteriidae52024-40%1986
House SparrowPasseridae52024-6%1986
Eurasian Collared-DoveColumbidae52024+57%2016
MallardAnatidae42024-25%1989
Western TanagerCardinalidae42023+117%1992
Red-tailed HawkAccipitridae32024+0%1986
Western Wood-PeweeTyrannidae32023-36%1986
American GoldfinchFringillidae32014-8%1988

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