BirdAnalyst
BBS Route · California · BCR 33

Willow Springs 2 Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 39 species recorded across 12 survey years, still active.

39Species 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 →
12Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2013–2025Span
2Observers

Bird Species Found on California Willow Springs 2

Top 39 of 39 species by most recent count. Each links to its species trend.

Species recorded on the Willow Springs 2 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
House SparrowPasseridae1892025+7%2015
Rock PigeonColumbidae782025+560%2015
House FinchFringillidae372025+129%2015
Common RavenCorvidae342025+57%2015
Bell's SparrowPasserellidae192025+9%2017
California QuailOdontophoridae162025+414%2016
Eurasian Collared-DoveColumbidae162025+62%2015
Horned LarkAlaudidae122025+22%2015
Mourning DoveColumbidae102025+70%2015
Hooded OrioleIcteridae102023+550%2016
Ash-throated FlycatcherTyrannidae52025-28%2015
Lawrence's GoldfinchFringillidae52014n/an/a
European StarlingSturnidae32025+90%2015
Black-throated SparrowPasserellidae32025-65%2015
Rock WrenTroglodytidae32023-17%2016
Lesser GoldfinchFringillidae32023+200%2017
Northern MockingbirdMimidae22025+50%2015
VerdinRemizidae22024-25%2015
White-throated SwiftApodidae22021-78%2016
Western KingbirdTyrannidae12025-29%2015
Scott's OrioleIcteridae12024-63%2015
Loggerhead ShrikeLaniidae12025-56%2015
LeConte's ThrasherMimidae12013n/an/a
Cactus WrenTroglodytidae12025-40%2016
Bullock's OrioleIcteridae12025+25%2016
Lark SparrowPasserellidae12025-36%2017
Red-tailed HawkAccipitridae12025-17%2019
Greater RoadrunnerCuculidae12015n/an/a
Lesser NighthawkCaprimulgidae12024-50%2016
Costa's HummingbirdTrochilidae12015n/an/a
Ladder-backed WoodpeckerPicidae12024+0%2016
Say's PhoebeTyrannidae12024-56%2018
Western MeadowlarkIcteridae12024+40%2017
Brewer's BlackbirdIcteridae12017-80%2016
American Barn OwlTytonidae12021n/an/a
Cliff SwallowHirundinidae12021n/an/a
KilldeerCharadriidae12025-50%2023
Cooper's HawkAccipitridae12024n/an/a
Anna's HummingbirdTrochilidae12024n/an/a

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14. A route is a sample, not a census.