BirdAnalyst
BBS Route · California · BCR 5

Friday Ridge Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 85 species recorded across 30 survey years, still active.

85Species 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 →
30Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1994–2024Span
2Observers

Bird Species Found on California Friday Ridge

Top 40 of 85 species by most recent count. Each links to its species trend.

Species recorded on the Friday Ridge 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
Hermit WarblerParulidae392024-22%1996
Steller's JayCorvidae302024-7%1996
Western TanagerCardinalidae302024-25%1996
Spotted TowheePasserellidae182024-6%1996
Red-breasted NuthatchSittidae182024-7%1996
Hermit ThrushTurdidae172024-44%1996
Lazuli BuntingCardinalidae152024-33%1996
Cassin's VireoVireonidae122024-69%1996
American RobinTurdidae122024+17%1996
Red-breasted SapsuckerPicidae102024+200%1997
Purple FinchFringillidae102024+140%1997
Black-headed GrosbeakCardinalidae92024-47%1996
Nashville WarblerParulidae82024-52%1996
Chestnut-backed ChickadeeParidae82024+92%1997
MacGillivray's WarblerParulidae62024-57%1996
Pine SiskinFringillidae62024-50%2009
Hairy WoodpeckerPicidae52024+200%1996
Green-tailed TowheePasserellidae52024+0%1996
Turkey VultureCathartidae51995n/an/a
Blue-gray GnatcatcherPolioptilidae52024+133%1998
BushtitAegithalidae52021+44%2002
Mourning DoveColumbidae42023+100%1998
Black-throated Gray WarblerParulidae42024-32%1996
Brown CreeperCerthiidae42024+400%2001
Band-tailed PigeonColumbidae42024+133%2009
Olive-sided FlycatcherTyrannidae32024-9%1996
Dusky FlycatcherTyrannidae32024-65%1996
Common RavenCorvidae32024-35%1996
Warbling VireoVireonidae32024-75%1996
Golden-crowned KingletRegulidae32024+13%1996
Townsend's SolitaireTurdidae32024-30%1996
Ash-throated FlycatcherTyrannidae32024+17%2005
Mountain QuailOdontophoridae22024-92%1996
California QuailOdontophoridae22023+267%1997
Pileated WoodpeckerPicidae22022+0%1996
Acorn WoodpeckerPicidae22024+133%1996
Yellow WarblerParulidae21994n/an/a
White-headed WoodpeckerPicidae22024+67%1997
Western Wood-PeweeTyrannidae22022-50%1997
Fox SparrowPasserellidae22024-44%1997

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