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BBS Route · California · BCR 15

Bass Lake Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 106 species recorded across 26 survey years, still active.

106Species 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 →
26Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1972–2019Span
8Observers

Bird Species Found on California Bass Lake

Top 40 of 106 species by most recent count. Each links to its species trend.

Species recorded on the Bass Lake 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
Acorn WoodpeckerPicidae902019+8%1974
Oak TitmouseParidae382019-9%1974
California Scrub-JayCorvidae332019-41%1974
Spotted TowheePasserellidae322019-47%1974
Nashville WarblerParulidae322011+171%1974
Ash-throated FlycatcherTyrannidae292019-23%1974
Lesser GoldfinchFringillidae292019+87%1974
Steller's JayCorvidae272019+51%1974
White-breasted NuthatchSittidae232019+9%1976
Western Wood-PeweeTyrannidae182019-41%1974
California TowheePasserellidae172019+7%1974
House SparrowPasseridae172019+54%1974
Common RavenCorvidae152019+683%1979
Mourning DoveColumbidae142019+15%1974
California QuailOdontophoridae132019-48%1974
House FinchFringillidae132019-32%1974
Black-headed GrosbeakCardinalidae132019-55%1974
Band-tailed PigeonColumbidae122018-9%1976
Brown-headed CowbirdIcteridae112019-20%1974
Tree SwallowHirundinidae112018+7%1982
Western TanagerCardinalidae102019+53%1974
European StarlingSturnidae82019-41%1974
Western BluebirdTurdidae82019+115%1975
Northern Pygmy-OwlStrigidae82017+700%2005
American RobinTurdidae72019-58%1974
Anna's HummingbirdTrochilidae62019+57%1976
Bullock's OrioleIcteridae62018-61%1974
Pine SiskinFringillidae62011+200%2002
Lazuli BuntingCardinalidae52019+92%1974
Yellow WarblerParulidae52011-30%1974
Wood DuckAnatidae51977n/an/a
Rock PigeonColumbidae51983-36%1979
Hermit WarblerParulidae51980n/an/a
Canada GooseAnatidae52019-60%2007
Wild TurkeyPhasianidae52005n/an/a
Red-shouldered HawkAccipitridae52019+43%2016
Evening GrosbeakFringillidae52008n/an/a
Violet-green SwallowHirundinidae42019-57%1975
Northern Rough-winged SwallowHirundinidae42007-9%1977
Great Blue HeronArdeidae42009+350%1980

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