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BBS Route · California · BCR 32

Tracy Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 75 species recorded across 13 survey years, no longer active.

75Species 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 →
13Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1992–2009Span
3Observers

Bird Species Found on California Tracy

Top 40 of 75 species by most recent count. Each links to its species trend.

Species recorded on the Tracy 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
Cliff SwallowHirundinidae1212009-26%1994
European StarlingSturnidae442009-62%1994
Brewer's BlackbirdIcteridae422009+9%1994
Western KingbirdTyrannidae352009+96%1994
American CrowCorvidae352009-72%1994
Red-winged BlackbirdIcteridae352009-9%1994
Mourning DoveColumbidae332009-23%1994
Common RavenCorvidae272009+144%1994
Western MeadowlarkIcteridae222009-44%1994
House FinchFringillidae182009-75%1994
House SparrowPasseridae182009-55%1994
Rock PigeonColumbidae172009+48%1995
Brown-headed CowbirdIcteridae172009+240%1994
Northern MockingbirdMimidae162009-32%1994
California Scrub-JayCorvidae132009-26%1994
California TowheePasserellidae102009-39%1994
Black PhoebeTyrannidae102009+467%1995
Lesser GoldfinchFringillidae72006+50%1997
Oak TitmouseParidae72004+133%1996
Western BluebirdTurdidae62006+120%1996
Eurasian Collared-DoveColumbidae62009n/an/a
Red-tailed HawkAccipitridae52009-37%1994
American KestrelFalconidae52009-50%1994
American RobinTurdidae42009-17%1994
Bewick's WrenTroglodytidae42004+100%1995
MallardAnatidae42009+14%1996
KilldeerCharadriidae32009+13%1994
Turkey VultureCathartidae32009-79%1994
Ash-throated FlycatcherTyrannidae32009-63%1994
Bullock's OrioleIcteridae32009+5%1994
Barn SwallowHirundinidae32009-32%1994
Loggerhead ShrikeLaniidae32009+30%1994
Northern Rough-winged SwallowHirundinidae32004-37%1997
Nuttall's WoodpeckerPicidae22009+160%1994
Anna's HummingbirdTrochilidae22009+133%1996
Say's PhoebeTyrannidae22006-50%1996
Yellow-billed MagpieCorvidae22009-8%1994
Tree SwallowHirundinidae22009+100%1992
Rock WrenTroglodytidae22006-67%1994
Double-crested CormorantPhalacrocoracidae21993n/an/a

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