BirdAnalyst
BBS Route · California · BCR 32

Tomhead Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 92 species recorded across 14 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 →
14Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1998–2011Span
1Observers

Bird Species Found on California Tomhead

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

Species recorded on the Tomhead 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
WrentitSylviidae322011+12%2000
Spotted TowheePasserellidae232011-5%2000
California QuailOdontophoridae192011-30%2000
Ash-throated FlycatcherTyrannidae192011-8%2000
California Scrub-JayCorvidae192011-2%2000
Black-headed GrosbeakCardinalidae172011-6%2000
Oak TitmouseParidae172011-39%2000
Brewer's BlackbirdIcteridae152011+17%2000
Cliff SwallowHirundinidae152011-50%2000
Bewick's WrenTroglodytidae152011-40%2000
Acorn WoodpeckerPicidae112011-20%2000
House FinchFringillidae112011-29%2000
Western MeadowlarkIcteridae102011-37%2000
Western TanagerCardinalidae102011-5%2000
Nashville WarblerParulidae102011+6%2000
White-breasted NuthatchSittidae92011-7%2000
Bullock's OrioleIcteridae82011-28%2000
Lesser GoldfinchFringillidae82011-39%2000
Steller's JayCorvidae72011+8%2000
Lark SparrowPasserellidae72011-34%2000
California TowheePasserellidae72011-39%2000
Western Wood-PeweeTyrannidae62011+43%2000
Yellow-billed MagpieCorvidae62011+233%2001
California ThrasherMimidae62011-56%2000
Red-breasted NuthatchSittidae62011+80%2000
Mountain QuailOdontophoridae52011-41%2000
European StarlingSturnidae52011-72%2000
Anna's HummingbirdTrochilidae42011+25%2000
Western KingbirdTyrannidae42011-39%2000
Brown-headed CowbirdIcteridae42011-50%2000
Blue-gray GnatcatcherPolioptilidae42011+150%2000
Violet-green SwallowHirundinidae42011+100%2002
Nuttall's WoodpeckerPicidae32011-30%2000
Black PhoebeTyrannidae32011+125%2001
Lazuli BuntingCardinalidae32011+14%2000
Cassin's VireoVireonidae32011-11%2000
Hermit WarblerParulidae32011-29%2000
American RobinTurdidae32011+0%2000
Hammond's FlycatcherTyrannidae32010+100%2005
KilldeerCharadriidae22011-58%2000

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