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BBS Route · California · BCR 32

Atwater Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 80 species recorded across 21 survey years, still active.

80Species 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 →
21Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1971–2012Span
9Observers

Bird Species Found on California Atwater

Top 40 of 80 species by most recent count. Each links to its species trend.

Species recorded on the Atwater 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 SparrowPasseridae755201240×1974
Red-winged BlackbirdIcteridae3432012+269%1974
Tricolored BlackbirdIcteridae2332012+639%1973
Western MeadowlarkIcteridae1222012-37%1973
Mourning DoveColumbidae882012+38%1973
European StarlingSturnidae812012+121%1973
Cliff SwallowHirundinidae712012-24%1973
Western KingbirdTyrannidae622012+140%1973
KilldeerCharadriidae572012-4%1973
White-faced IbisThreskiornithidae502012+676%1995
House FinchFringillidae472012-16%1974
Brewer's BlackbirdIcteridae462012+13%1973
Yellow-billed MagpieCorvidae402004+100%1973
American White PelicanPelecanidae382007-32%1988
Brown-headed CowbirdIcteridae33201213×1978
American CrowCorvidae322012+567%1974
Ring-necked PheasantPhasianidae222012-84%1973
American RobinTurdidae202012+230%1976
Northern MockingbirdMimidae172012+191%1973
American GoldfinchFringillidae162012+0%2004
Loggerhead ShrikeLaniidae142012+500%1974
California QuailOdontophoridae141973n/an/a
Swainson's HawkAccipitridae142012+88%2004
Eurasian Collared-DoveColumbidae132012n/an/a
MallardAnatidae122012+129%1973
Long-billed CurlewScolopacidae122007-45%1986
Rock PigeonColumbidae112012+77%1981
Great EgretArdeidae112012+321%1984
Blue GrosbeakCardinalidae102012+130%2003
Red-tailed HawkAccipitridae92012+185%1973
Horned LarkAlaudidae92012-72%1973
Northern HarrierAccipitridae72012+171%1973
Barn SwallowHirundinidae62012+11%1976
Lark SparrowPasserellidae62012+500%2003
Burrowing OwlStrigidae52007+73%1976
Lesser NighthawkCaprimulgidae52004+0%1983
California Scrub-JayCorvidae52012+150%1984
Black PhoebeTyrannidae52012+100%2003
Northern PintailAnatidae41990-67%1974
Bullock's OrioleIcteridae42012+0%1976

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