BirdAnalyst
BBS Route · California · BCR 32

Folsom Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 113 species recorded across 41 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 →
41Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1984–2025Span
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 FinchFringillidae742025+63%1986
Lesser GoldfinchFringillidae422025-25%1986
Ash-throated FlycatcherTyrannidae262025-11%1986
Spotted TowheePasserellidae262025-20%1986
WrentitSylviidae262025-31%1986
European StarlingSturnidae212025-34%1986
Oak TitmouseParidae192025-43%1986
Lawrence's GoldfinchFringillidae182025+122%1986
Mourning DoveColumbidae172025-19%1986
Turkey VultureCathartidae172025+94%1986
Acorn WoodpeckerPicidae172025+78%1986
California TowheePasserellidae162025+14%1986
White-breasted NuthatchSittidae162025-18%1986
California Scrub-JayCorvidae152025-39%1986
Red-winged BlackbirdIcteridae142025+4%1986
Canada GooseAnatidae132025+53%2001
Orange-crowned WarblerParulidae122025-35%1986
Western BluebirdTurdidae122025+23%1986
Brown-headed CowbirdIcteridae112025-78%1986
Black-headed GrosbeakCardinalidae112025-53%1986
Violet-green SwallowHirundinidae102025+65%1986
Bullock's OrioleIcteridae72025-75%1986
California QuailOdontophoridae62025+95%1986
Wild TurkeyPhasianidae62025+340%1989
Eurasian Collared-DoveColumbidae62025+114%2016
Red-tailed HawkAccipitridae52025+11%1986
House SparrowPasseridae52025+0%1986
Northern MockingbirdMimidae52025+233%1986
Bewick's WrenTroglodytidae52025-78%1986
Northern House WrenTroglodytidae52025-71%1986
Lazuli BuntingCardinalidae42025-93%1986
Hutton's VireoVireonidae42025-71%1986
BushtitAegithalidae42025-55%1986
Western TanagerCardinalidae42023+117%1992
Common RavenCorvidae42025+100%2018
Nuttall's WoodpeckerPicidae32025-51%1986
American GoldfinchFringillidae32014-8%1988
Lark SparrowPasserellidae32025-69%1986
Chipping SparrowPasserellidae32025-71%1986
Song SparrowPasserellidae32024+25%1986

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14. A route is a sample, not a census.