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BBS Route · California · BCR 5

Big Flat Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 54 species recorded across 7 survey years, still active.

54Species 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 →
7Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2002–2014Span
2Observers

Bird Species Found on California Big Flat

Top 40 of 54 species by most recent count. Each links to its species trend.

Species recorded on the Big Flat 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
WrentitSylviidae292014-30%2004
Spotted TowheePasserellidae232014-2%2004
Hermit ThrushTurdidae222014-25%2004
Swainson's ThrushTurdidae202014-22%2004
Western TanagerCardinalidae182014-48%2004
Red-breasted NuthatchSittidae152014+26%2004
Steller's JayCorvidae142014-9%2004
Black-throated Gray WarblerParulidae122014-10%2004
Band-tailed PigeonColumbidae52014+13%2004
Hermit WarblerParulidae52014-65%2006
Pacific WrenTroglodytidae52014+67%2006
Nashville WarblerParulidae42012+67%2004
Allen's HummingbirdTrochilidae42014n/an/a
Cassin's VireoVireonidae32004+0%2002
MacGillivray's WarblerParulidae32014-37%2004
Hairy WoodpeckerPicidae22011+0%2002
Dusky FlycatcherTyrannidae22014-29%2004
Common RavenCorvidae22014+0%2004
Black-headed GrosbeakCardinalidae22012-57%2003
Warbling VireoVireonidae22014-33%2003
Hutton's VireoVireonidae22014-77%2004
American DipperCinclidae22002n/an/a
American RobinTurdidae22014+100%2003
Fox SparrowPasserellidae22004-60%2003
Golden-crowned KingletRegulidae22011+50%2004
Varied ThrushTurdidae22003n/an/a
Townsend's SolitaireTurdidae22014-25%2011
Pine SiskinFringillidae22012n/an/a
Western Wood-PeweeTyrannidae12002n/an/a
Purple FinchFringillidae12012-50%2004
White-crowned SparrowPasserellidae12002n/an/a
Song SparrowPasserellidae12012-50%2004
Violet-green SwallowHirundinidae12002n/an/a
Northern Rough-winged SwallowHirundinidae12002n/an/a
Orange-crowned WarblerParulidae12014+50%2006
Wilson's WarblerParulidae12014-54%2004
Bewick's WrenTroglodytidae12012+0%2004
Brown CreeperCerthiidae12014-63%2004
Mountain ChickadeeParidae12014-46%2004
Chestnut-backed ChickadeeParidae12012-55%2004

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