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BBS Route · California · BCR 32

Cordova Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 63 species recorded across 9 survey years, no longer active.

63Species 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 →
9Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1971–1981Span
5Observers

Bird Species Found on California Cordova

Top 40 of 63 species by most recent count. Each links to its species trend.

Species recorded on the Cordova 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
European StarlingSturnidae1291981+49%1974
Cliff SwallowHirundinidae1231981+174%1974
Brewer's BlackbirdIcteridae731981+15%1974
Rock PigeonColumbidae701981+669%1974
House FinchFringillidae501981+118%1974
Western MeadowlarkIcteridae291981+21%1974
Brown-headed CowbirdIcteridae281980+39%1976
Red-winged BlackbirdIcteridae231981+126%1975
KilldeerCharadriidae211981+92%1974
Northern MockingbirdMimidae161981+42%1974
American CrowCorvidae151981+6%1974
Tree SwallowHirundinidae131980+160%1972
Western KingbirdTyrannidae121981+39%1974
American RobinTurdidae121981+200%1975
BushtitAegithalidae121979n/an/a
House SparrowPasseridae91981+111%1974
Yellow-billed MagpieCorvidae81981+196%1974
Red-tailed HawkAccipitridae71981+69%1974
California Scrub-JayCorvidae71981+30%1974
Tricolored BlackbirdIcteridae71981+60%1974
Lark SparrowPasserellidae71979+600%1974
Black-headed GrosbeakCardinalidae71979n/an/a
Mourning DoveColumbidae61981-64%1974
Ring-necked PheasantPhasianidae41981-31%1974
American AvocetRecurvirostridae41977+33%1974
Ash-throated FlycatcherTyrannidae41981+300%1977
Black PhoebeTyrannidae41980+100%1977
Bewick's WrenTroglodytidae41980n/an/a
American BitternArdeidae31975n/an/a
Lesser GoldfinchFringillidae31981-50%1977
Oak TitmouseParidae31980+200%1977
MallardAnatidae21980-20%1974
Great Blue HeronArdeidae21981-44%1974
Western BluebirdTurdidae21980+100%1971
Ruddy DuckAnatidae21981+100%1972
Great EgretArdeidae21981+0%1979
California QuailOdontophoridae11981+700%1974
Turkey VultureCathartidae11981+233%1974
White-tailed KiteAccipitridae11981+40%1974
Northern HarrierAccipitridae11981+75%1976

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