BirdAnalyst
BBS Route · California · BCR 15

Forest Hill Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 87 species recorded across 23 survey years, still active.

87Species 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 →
23Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1997–2022Span
3Observers

Bird Species Found on California Forest Hill

Top 40 of 87 species by most recent count. Each links to its species trend.

Species recorded on the Forest Hill 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
Black-headed GrosbeakCardinalidae502022+17%1999
Black-throated Gray WarblerParulidae392022+22%1999
Steller's JayCorvidae362022-4%1999
Spotted TowheePasserellidae342022-8%1999
WrentitSylviidae342022+46%1999
American RobinTurdidae322022+6%1999
Western TanagerCardinalidae272022+18%1999
Cassin's VireoVireonidae272022+34%1999
Nashville WarblerParulidae242022-41%1999
Red-breasted NuthatchSittidae242022+275%1999
Mountain QuailOdontophoridae92022-16%1999
Acorn WoodpeckerPicidae82022-17%1999
Hutton's VireoVireonidae82022+14%1999
Hermit WarblerParulidae62022-69%1999
Red-breasted SapsuckerPicidae62022+80%2010
Hairy WoodpeckerPicidae62022+200%2001
Mountain ChickadeeParidae52022+100%2000
Band-tailed PigeonColumbidae42022-43%1999
Mourning DoveColumbidae42022+117%1999
Pileated WoodpeckerPicidae42022+0%2000
Orange-crowned WarblerParulidae42022-35%1999
Northern House WrenTroglodytidae42021+200%2000
Oak TitmouseParidae42014+33%2000
Blue-gray GnatcatcherPolioptilidae42022+33%1999
Rufous-crowned SparrowPasserellidae42022+233%2003
Western Wood-PeweeTyrannidae42022+83%2001
California QuailOdontophoridae32022+167%2003
Hammond's FlycatcherTyrannidae32022+40%1999
California Scrub-JayCorvidae32022-64%1999
Red CrossbillFringillidae32002+50%1997
Barn SwallowHirundinidae32019+17%1999
Canyon WrenTroglodytidae32022-25%1999
Chestnut-backed ChickadeeParidae32005-40%1999
Hermit ThrushTurdidae32019-44%1999
Bullock's OrioleIcteridae32019+150%2004
White-headed WoodpeckerPicidae32022+67%2007
Canada GooseAnatidae32021n/an/a
Olive-sided FlycatcherTyrannidae22022-58%1999
Purple FinchFringillidae22022+20%1999
Violet-green SwallowHirundinidae22021-70%1999

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