BirdAnalyst
BBS Route · California · BCR 33

Cottonwood Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 42 species recorded across 37 survey years, still active.

42Species 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 →
37Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1973–2019Span
5Observers

Bird Species Found on California Cottonwood

Top 40 of 42 species by most recent count. Each links to its species trend.

Species recorded on the Cottonwood 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
Ash-throated FlycatcherTyrannidae92019-12%1976
Common RavenCorvidae92019+60%1980
Northern MockingbirdMimidae62019-55%1980
Gambel's QuailOdontophoridae62019-48%1980
Mourning DoveColumbidae52019-85%1976
Cactus WrenTroglodytidae52019-56%1986
Turkey VultureCathartidae52019+50%2016
LeConte's ThrasherMimidae32019-60%1986
Crissal ThrasherMimidae31980n/an/a
Cassin's KingbirdTyrannidae31989n/an/a
White-throated SwiftApodidae22003-33%1981
Lesser GoldfinchFringillidae22016+50%1992
PhainopeplaPtiliogonatidae22019+20%1981
Loggerhead ShrikeLaniidae22019-64%1976
Rock WrenTroglodytidae22004+0%1981
Black-tailed GnatcatcherPolioptilidae22019-33%1988
Scott's OrioleIcteridae22019-54%1986
Burrowing OwlStrigidae22011+50%1993
Ladder-backed WoodpeckerPicidae22017+0%1989
Red-tailed HawkAccipitridae22012+33%1986
White-winged DoveColumbidae22001+50%1996
Bullock's OrioleIcteridae22001+100%1996
European StarlingSturnidae21998n/an/a
Say's PhoebeTyrannidae12019-75%1986
House FinchFringillidae12017-84%1976
Black-throated SparrowPasserellidae12019-64%1976
VerdinRemizidae12019-46%1976
Greater RoadrunnerCuculidae12017+0%2001
Costa's HummingbirdTrochilidae12019-73%1980
Horned LarkAlaudidae12015-53%1980
Prairie FalconFalconidae11976n/an/a
Brown-headed CowbirdIcteridae12005-17%1994
Black-headed GrosbeakCardinalidae11976n/an/a
Canyon WrenTroglodytidae12013-57%1986
Bendire's ThrasherMimidae12016-33%1991
Lesser NighthawkCaprimulgidae12003-67%1992
Hooded OrioleIcteridae11992n/an/a
American KestrelFalconidae11995n/an/a
Bewick's WrenTroglodytidae11996n/an/a
Hermit WarblerParulidae11999n/an/a

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