BirdAnalyst
BBS Route · California · BCR 33

Alamo River Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 65 species recorded across 23 survey years, still active.

65Species 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 →
23Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1973–2018Span
4Observers

Bird Species Found on California Alamo River

Top 40 of 65 species by most recent count. Each links to its species trend.

Species recorded on the Alamo River 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
Cliff SwallowHirundinidae233201817×1975
Red-winged BlackbirdIcteridae2152018-61%1975
Mourning DoveColumbidae1402018+88%1975
White-faced IbisThreskiornithidae1221992n/an/a
Great-tailed GrackleIcteridae93201845×1982
European StarlingSturnidae742018-27%1975
Western MeadowlarkIcteridae602018+58%1975
Rock PigeonColumbidae442018+63%1975
Eurasian Collared-DoveColumbidae262018-26%2017
Burrowing OwlStrigidae242018+52%1975
House FinchFringillidae23201814×1984
Brewer's BlackbirdIcteridae202018+100%2017
Western Cattle-EgretArdeidae182017+67%1978
Western KingbirdTyrannidae162018+7%1975
Common YellowthroatParulidae152018+108%1976
Black PhoebeTyrannidae132018+257%1975
Horned LarkAlaudidae132018+340%1980
Barn SwallowHirundinidae122018-37%1975
KilldeerCharadriidae112018+53%1977
House SparrowPasseridae82018-78%1975
Northern MockingbirdMimidae82018+25%1975
Yellow-headed BlackbirdIcteridae61994-32%1975
American KestrelFalconidae52018+400%1978
Caspian TernLaridae51986n/an/a
White-winged DoveColumbidae42018+114%1975
Common Ground DoveColumbidae42018-61%1975
Gambel's QuailOdontophoridae32018-75%1975
Greater RoadrunnerCuculidae31994-17%1975
American CootRallidae31992-17%1976
Black-necked StiltRecurvirostridae31994+100%1982
VerdinRemizidae32018+100%1978
Lesser GoldfinchFringillidae32017+200%1978
Song SparrowPasserellidae32018+0%1992
Lucy's WarblerParulidae21975n/an/a
Great EgretArdeidae22018+33%1989
Lark SparrowPasserellidae22018+50%1985
MallardAnatidae21982-78%1979
Common GallinuleRallidae21990+100%1979
Gila WoodpeckerPicidae21982n/an/a
Common RavenCorvidae22017n/an/a

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