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BBS Route · California · BCR 15

Hat Creek Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 110 species recorded across 42 survey years, still active.

110Species 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 →
42Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1973–2018Span
4Observers

Bird Species Found on California Hat Creek

Top 40 of 110 species by most recent count. Each links to its species trend.

Species recorded on the Hat Creek 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
Red-breasted NuthatchSittidae342018+87%1975
Steller's JayCorvidae302018-10%1975
Mountain QuailOdontophoridae282018+180%1975
Mountain ChickadeeParidae282018-39%1975
American CrowCorvidae202016+950%1996
Nashville WarblerParulidae162018-11%1975
Western TanagerCardinalidae152018-3%1975
Olive-sided FlycatcherTyrannidae142018-64%1975
Western Wood-PeweeTyrannidae132018-63%1975
Dusky FlycatcherTyrannidae132018+177%1975
Western BluebirdTurdidae122018+143%1979
Double-crested CormorantPhalacrocoracidae121987n/an/a
Spotted TowheePasserellidae112018+96%1975
Clark's NutcrackerCorvidae102006+633%1982
Brewer's BlackbirdIcteridae102018+200%1982
Hammond's FlycatcherTyrannidae92018+9%1976
Fox SparrowPasserellidae82018-43%1975
American RobinTurdidae82018-78%1975
Common NighthawkCaprimulgidae82018-55%1976
Red-winged BlackbirdIcteridae62018+140%1984
Lazuli BuntingCardinalidae62018+167%2005
Pygmy NuthatchSittidae62018+11%1996
Rock WrenTroglodytidae6201818×2012
White-throated SwiftApodidae62000n/an/a
Mourning DoveColumbidae52018+300%1975
White-headed WoodpeckerPicidae52018+129%1975
Hairy WoodpeckerPicidae52018+89%1976
Cassin's VireoVireonidae52018+44%1976
European StarlingSturnidae51988-17%1975
Band-tailed PigeonColumbidae42018+0%1977
Yellow-headed BlackbirdIcteridae42007+375%1975
Chipping SparrowPasserellidae42018-40%1975
Brown CreeperCerthiidae42018-68%1975
Turkey VultureCathartidae42014+33%1993
Common RavenCorvidae4201815×1990
Vaux's SwiftApodidae32002+50%1981
Brown-headed CowbirdIcteridae32016-39%1975
Hermit WarblerParulidae32018+8%1975
Golden-crowned KingletRegulidae32015+80%1977
Cassin's FinchFringillidae32018+150%1980

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