BirdAnalyst
BBS Route · California · BCR 5

Hiouchi Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 59 species recorded across 7 survey years, still active.

59Species 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 Hiouchi

Top 40 of 59 species by most recent count. Each links to its species trend.

Species recorded on the Hiouchi 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
Swainson's ThrushTurdidae302014+23%2004
Steller's JayCorvidae212014-16%2004
Hermit ThrushTurdidae182014+23%2004
Black-throated Gray WarblerParulidae152014-20%2004
Hermit WarblerParulidae142014-18%2004
Wilson's WarblerParulidae112014-54%2004
Western TanagerCardinalidae102014-43%2004
American RobinTurdidae92014+14%2004
Common RavenCorvidae82014-9%2004
Hutton's VireoVireonidae82014-33%2004
Black-headed GrosbeakCardinalidae72014-40%2004
WrentitSylviidae62014-70%2004
Pacific WrenTroglodytidae52014-10%2004
Band-tailed PigeonColumbidae42014+17%2003
Red-breasted NuthatchSittidae42014-38%2004
Chestnut-backed ChickadeeParidae42014-48%2004
California QuailOdontophoridae42014+100%2006
Turkey VultureCathartidae32014+67%2003
Spotted TowheePasserellidae32014-36%2004
Nashville WarblerParulidae32012+9%2004
Orange-crowned WarblerParulidae32014+25%2003
Black PhoebeTyrannidae22006+100%2003
Western Wood-PeweeTyrannidae22003+100%2002
White-crowned SparrowPasserellidae22004+0%2002
Cliff SwallowHirundinidae22004-33%2002
Northern Rough-winged SwallowHirundinidae22012-78%2004
Warbling VireoVireonidae22011+11%2003
American DipperCinclidae22012+0%2003
Common MerganserAnatidae22003n/an/a
Sooty GrousePhasianidae22014+100%2003
Brown-headed CowbirdIcteridae22003n/an/a
BushtitAegithalidae22014+0%2004
Acorn WoodpeckerPicidae22004n/an/a
Common NighthawkCaprimulgidae22004n/an/a
Pileated WoodpeckerPicidae12014-44%2004
Anna's HummingbirdTrochilidae12002n/an/a
Olive-sided FlycatcherTyrannidae12011-75%2002
Dusky FlycatcherTyrannidae12011-50%2002
Purple FinchFringillidae12014-43%2004
Pine SiskinFringillidae12012+0%2002

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