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BBS Route · California · BCR 5

Friday Ridge Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 85 species recorded across 31 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 →
31Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1994–2025Span
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
Steller's JayCorvidae282025-14%1996
Red-breasted NuthatchSittidae282025-3%1996
Spotted TowheePasserellidae232025-4%1996
Western TanagerCardinalidae202025-31%1996
American RobinTurdidae182025+40%1996
Hermit WarblerParulidae152025-44%1996
Lazuli BuntingCardinalidae142025-30%1996
Chestnut-backed ChickadeeParidae132025+117%1997
Brown CreeperCerthiidae102025+567%2001
Hermit ThrushTurdidae92025-42%1996
Chipping SparrowPasserellidae72025+43%2001
Acorn WoodpeckerPicidae62025+150%1996
Mountain ChickadeeParidae62025+40%1996
Common RavenCorvidae52025-24%1996
Green-tailed TowheePasserellidae52024+0%1996
MacGillivray's WarblerParulidae52025-62%1996
BushtitAegithalidae52021+44%2002
Hairy WoodpeckerPicidae42025+150%1996
Red-breasted SapsuckerPicidae42025+171%1997
Black-headed GrosbeakCardinalidae42025-73%1996
Black-throated Gray WarblerParulidae42024-32%1996
Townsend's SolitaireTurdidae42025-20%1996
Purple FinchFringillidae42025+80%1997
Pine SiskinFringillidae42025-39%2009
Mourning DoveColumbidae32025+140%1998
Olive-sided FlycatcherTyrannidae32025-36%1996
WrentitSylviidae32025-14%1997
Fox SparrowPasserellidae32025-50%1997
Blue-gray GnatcatcherPolioptilidae32025+200%1998
Band-tailed PigeonColumbidae32025+117%2009
Purple MartinHirundinidae32025+50%2021
Mountain QuailOdontophoridae22024-92%1996
California QuailOdontophoridae22023+267%1997
Dusky FlycatcherTyrannidae22025-68%1996
Cassin's VireoVireonidae22025-74%1996
Yellow WarblerParulidae21994n/an/a
White-headed WoodpeckerPicidae22025+100%1997
Western Wood-PeweeTyrannidae22022-50%1997
Hutton's VireoVireonidae22025+0%1997
Yellow-breasted ChatIcteriidae22024-58%1997

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