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BBS Route · California · BCR 15

Last Chance Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 102 species recorded across 20 survey years, still active.

102Species 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 →
20Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1993–2019Span
4Observers

Bird Species Found on California Last Chance

Top 40 of 102 species by most recent count. Each links to its species trend.

Species recorded on the Last Chance 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
Western Wood-PeweeTyrannidae522019+5%1998
Cliff SwallowHirundinidae502019+5%1998
Mountain ChickadeeParidae442019-5%1998
American RobinTurdidae322019-58%1998
Steller's JayCorvidae282019+115%1998
California QuailOdontophoridae252019+134%2000
Chipping SparrowPasserellidae222019-51%1998
Green-tailed TowheePasserellidae192019-37%1998
Vesper SparrowPasserellidae172019+63%1998
Western TanagerCardinalidae162019+12%1998
Song SparrowPasserellidae152019+20%1998
Brown CreeperCerthiidae152019+75%1999
Mountain QuailOdontophoridae122019+9%1999
Olive-sided FlycatcherTyrannidae122019+19%1998
Golden-crowned KingletRegulidae112019+175%2016
Cassin's FinchFringillidae102019-5%1998
Brewer's SparrowPasserellidae102019-7%1998
Turkey VultureCathartidae92014+400%2007
Clark's NutcrackerCorvidae82019+26%1999
Brown-headed CowbirdIcteridae82019-23%1998
MallardAnatidae82019+83%2000
Lewis's WoodpeckerPicidae82000n/an/a
Wilson's WarblerParulidae72019+240%2009
Red-winged BlackbirdIcteridae62019-58%1998
Brewer's BlackbirdIcteridae62019+4%1998
White-crowned SparrowPasserellidae62019+317%2001
Fox SparrowPasserellidae62019-77%2000
Dusky FlycatcherTyrannidae52019-47%1998
Pine SiskinFringillidae52019-61%1998
Gray FlycatcherTyrannidae52019-61%1999
Tree SwallowHirundinidae52019+114%2000
Pygmy NuthatchSittidae52019-57%1999
Green-winged TealAnatidae52019+400%2011
Cassin's VireoVireonidae52019+267%2017
Yellow WarblerParulidae42019-81%1998
MacGillivray's WarblerParulidae42019-27%2000
Ruby-crowned KingletRegulidae42019n/an/a
Mourning DoveColumbidae32019+26%1998
American KestrelFalconidae32019+0%1998
Horned LarkAlaudidae32019-82%1998

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