BirdAnalyst
BBS Route · California · BCR 32

Tracy 2 Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 79 species recorded across 11 survey years, still active.

79Species 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 →
11Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2010–2024Span
3Observers

Bird Species Found on California Tracy 2

Top 40 of 79 species by most recent count. Each links to its species trend.

Species recorded on the Tracy 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 FinchFringillidae812024+14%2012
European StarlingSturnidae772024-36%2012
Cliff SwallowHirundinidae442024-55%2012
Common RavenCorvidae382024+141%2012
Brewer's BlackbirdIcteridae382024+11%2012
Eurasian Collared-DoveColumbidae33202412×2012
California Scrub-JayCorvidae282024+6%2012
House SparrowPasseridae252024-28%2012
Mourning DoveColumbidae232024-8%2012
Western MeadowlarkIcteridae222024-48%2012
Rock PigeonColumbidae212024+393%2012
Red-winged BlackbirdIcteridae212024+22%2012
California QuailOdontophoridae202024-29%2012
KilldeerCharadriidae182024+107%2012
Turkey VultureCathartidae172023+16%2014
Western KingbirdTyrannidae132024-45%2012
Canada GooseAnatidae122023n/an/a
Ash-throated FlycatcherTyrannidae112024+69%2012
American CrowCorvidae102024-57%2012
American RobinTurdidae102024+125%2012
Wild TurkeyPhasianidae102024+73%2013
Acorn WoodpeckerPicidae92024+800%2015
BushtitAegithalidae92015+23%2012
Brown-headed CowbirdIcteridae82024+0%2012
Northern MockingbirdMimidae82024-44%2012
California TowheePasserellidae72024-36%2012
Western BluebirdTurdidae72024-15%2015
Swainson's HawkAccipitridae62024-95%2012
American KestrelFalconidae62024-46%2012
Nuttall's WoodpeckerPicidae62024+7%2012
American GoldfinchFringillidae62024+100%2023
Yellow-billed MagpieCorvidae52024-10%2012
Bullock's OrioleIcteridae52024-67%2012
Loggerhead ShrikeLaniidae52024+73%2012
Black PhoebeTyrannidae52024+40%2013
Oak TitmouseParidae52024+320%2013
Barn SwallowHirundinidae42024-18%2012
Anna's HummingbirdTrochilidae42024+71%2014
Great EgretArdeidae42015n/an/a
Red-tailed HawkAccipitridae32024-25%2012

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