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BBS Route · California · BCR 32

Oak Grove Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 107 species recorded across 48 survey years, no longer active.

107Species 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 →
48Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1968–2025Span
3Observers

Bird Species Found on California Oak Grove

Top 40 of 107 species by most recent count. Each links to its species trend.

Species recorded on the Oak Grove 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 FinchFringillidae782025+55%1970
California TowheePasserellidae512025+374%1970
Common RavenCorvidae452025+309%1970
House SparrowPasseridae412025+553%1981
California QuailOdontophoridae332025+175%1971
California Scrub-JayCorvidae312025+196%1970
Spotted TowheePasserellidae302025+708%1972
Yellow-headed BlackbirdIcteridae251984n/an/a
Northern MockingbirdMimidae202025+833%1980
Mourning DoveColumbidae192025-19%1970
Cassin's KingbirdTyrannidae19202511×1974
Eurasian Collared-DoveColumbidae172025+122%2012
Ash-throated FlycatcherTyrannidae142025+650%1971
Hooded OrioleIcteridae142025+600%1974
Lesser GoldfinchFringillidae142025+514%1979
California ThrasherMimidae122025+90%1970
PhainopeplaPtiliogonatidae112025+211%1970
Bewick's WrenTroglodytidae11202518×1971
WrentitSylviidae112025+413%1971
Black-headed GrosbeakCardinalidae92025+367%1970
Black-chinned SparrowPasserellidae92025+400%1979
Red-tailed HawkAccipitridae82025+40%1971
BushtitAegithalidae82025+175%1972
Western MeadowlarkIcteridae62025+125%1970
Bullock's OrioleIcteridae62025+86%1972
Band-tailed PigeonColumbidae61973n/an/a
American CrowCorvidae52025-46%1971
Brewer's BlackbirdIcteridae42025-23%1970
European StarlingSturnidae42025+333%1971
Gambel's QuailOdontophoridae41971-93%1970
Black-throated SparrowPasserellidae42025-25%1980
Song SparrowPasserellidae42024+20%1983
Western KingbirdTyrannidae32025+86%1977
Cactus WrenTroglodytidae32025+10%1970
Western BluebirdTurdidae32025+200%1976
Rock PigeonColumbidae32014+100%1977
Brown-headed CowbirdIcteridae32025+0%1976
Nuttall's WoodpeckerPicidae32025+20%1985
American GoldfinchFringillidae31995-42%1980
Chipping SparrowPasserellidae32003+200%1981

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14. A route is a sample, not a census.