BirdAnalyst
BBS Route · California · BCR 5

South Fork Mtn Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 70 species recorded across 18 survey years, still active.

70Species 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 →
18Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2000–2022Span
7Observers

Bird Species Found on California South Fork Mtn

Top 40 of 70 species by most recent count. Each links to its species trend.

Species recorded on the South Fork Mtn 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
Mountain QuailOdontophoridae472022+8%2004
Western TanagerCardinalidae452022+13%2003
Nashville WarblerParulidae422022+268%2004
Red-breasted NuthatchSittidae342022-17%2003
Steller's JayCorvidae302022+29%2003
Hermit WarblerParulidae292022-29%2003
Fox SparrowPasserellidae272022-21%2003
Black-headed GrosbeakCardinalidae262022+235%2003
Mountain ChickadeeParidae262022+13%2003
Spotted TowheePasserellidae252022+90%2003
Dusky FlycatcherTyrannidae152022-15%2003
Lazuli BuntingCardinalidae132022+17%2003
Green-tailed TowheePasserellidae112022+50%2003
Acorn WoodpeckerPicidae102022+83%2003
Hairy WoodpeckerPicidae92022+100%2003
Western Wood-PeweeTyrannidae92022+71%2003
American RobinTurdidae92022+9%2003
Red CrossbillFringillidae92018+67%2005
Chipping SparrowPasserellidae82022+160%2003
MacGillivray's WarblerParulidae82022+26%2003
Red-breasted SapsuckerPicidae72022+5%2003
Western BluebirdTurdidae52022+25%2005
Common RavenCorvidae52022-20%2005
Cliff SwallowHirundinidae52008+150%2007
Olive-sided FlycatcherTyrannidae42022-63%2003
Pine SiskinFringillidae42022+14%2004
Brown CreeperCerthiidae42022-59%2004
Golden-crowned KingletRegulidae42022-59%2003
Cassin's FinchFringillidae42022-33%2005
Warbling VireoVireonidae32022-63%2004
Townsend's SolitaireTurdidae32022-56%2003
Bullock's OrioleIcteridae32022-27%2006
Purple FinchFringillidae32022-40%2009
White-headed WoodpeckerPicidae22022-13%2003
Anna's HummingbirdTrochilidae22022+0%2006
Allen's HummingbirdTrochilidae22019+75%2003
California Scrub-JayCorvidae22022+0%2003
Western MeadowlarkIcteridae22021-25%2003
Lesser GoldfinchFringillidae22021-64%2003
Western KingbirdTyrannidae22022-14%2006

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