BirdAnalyst
BBS Route · California · BCR 32

Anza 2 Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 92 species recorded across 19 survey years, still active.

92Species 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 →
19Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2005–2024Span
1Observers

Bird Species Found on California Anza 2

Top 40 of 92 species by most recent count. Each links to its species trend.

Species recorded on the Anza 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
California Scrub-JayCorvidae442024+0%2007
Brewer's BlackbirdIcteridae362024-73%2007
Common RavenCorvidae332024+137%2007
Yellow-headed BlackbirdIcteridae322005n/an/a
Bewick's WrenTroglodytidae242024-20%2007
Western MeadowlarkIcteridae232024-10%2007
California TowheePasserellidae212024+19%2007
House SparrowPasseridae192024-10%2007
House FinchFringillidae172024-56%2007
Spotted TowheePasserellidae172024-38%2007
Black-chinned SparrowPasserellidae162024+24%2007
Lesser GoldfinchFringillidae152024-21%2007
Mourning DoveColumbidae142024+50%2007
Ash-throated FlycatcherTyrannidae142024+20%2007
Acorn WoodpeckerPicidae122024+67%2007
California QuailOdontophoridae112024-47%2008
Eurasian Collared-DoveColumbidae112024+54%2011
Red-winged BlackbirdIcteridae102024-24%2007
California ThrasherMimidae102024+32%2007
Oak TitmouseParidae102024+55%2007
Black-headed GrosbeakCardinalidae92024-37%2007
Horned LarkAlaudidae82024+50%2007
WrentitSylviidae82024-44%2007
European StarlingSturnidae62024-68%2007
Northern Rough-winged SwallowHirundinidae62005n/an/a
Lazuli BuntingCardinalidae62024+114%2010
Red-tailed HawkAccipitridae52024+25%2007
Western Wood-PeweeTyrannidae52024-35%2007
Lawrence's GoldfinchFringillidae52024+8%2007
Song SparrowPasserellidae52024+100%2007
Blue GrosbeakCardinalidae52024-43%2007
Mountain ChickadeeParidae52024+200%2007
Western BluebirdTurdidae52024+300%2008
Nuttall's WoodpeckerPicidae42024+60%2007
Western KingbirdTyrannidae42024+63%2007
Say's PhoebeTyrannidae42024+233%2009
Bullock's OrioleIcteridae42023+60%2007
Northern MockingbirdMimidae42024-20%2007
White-breasted NuthatchSittidae42024+350%2007
Pygmy NuthatchSittidae42024+8%2007

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