BirdAnalyst
BBS Route · California · BCR 32

Carrizo Pln Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 62 species recorded across 35 survey years, still active.

62Species 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 →
35Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1970–2023Span
7Observers

Bird Species Found on California Carrizo Pln

Top 40 of 62 species by most recent count. Each links to its species trend.

Species recorded on the Carrizo Pln 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
Horned LarkAlaudidae1002023-92%1977
Western MeadowlarkIcteridae992023-51%1977
American CootRallidae881978n/an/a
Common RavenCorvidae822023+184%1977
Forster's TernLaridae151991n/an/a
Cliff SwallowHirundinidae102014-14%1981
Green-winged TealAnatidae101978n/an/a
Northern PintailAnatidae101978n/an/a
Short-eared OwlStrigidae102011-55%1993
Mourning DoveColumbidae92023-68%1977
Northern Rough-winged SwallowHirundinidae92021-68%1970
American AvocetRecurvirostridae92023-74%1992
Tricolored BlackbirdIcteridae92011+34%1995
Red-tailed HawkAccipitridae82023+183%1977
Black-necked StiltRecurvirostridae71998-13%1970
Loggerhead ShrikeLaniidae52023-69%1977
KilldeerCharadriidae42014-50%1978
European StarlingSturnidae42023+7%1977
California GullLaridae41978n/an/a
Ruddy DuckAnatidae41978n/an/a
Bell's SparrowPasserellidae32023-18%1977
House SparrowPasseridae32023-59%1980
House FinchFringillidae32023-62%1978
Say's PhoebeTyrannidae32021+133%1991
Savannah SparrowPasserellidae32023-73%1999
Grasshopper SparrowPasserellidae32003-89%1998
Rock WrenTroglodytidae32023+200%2006
Northern HarrierAccipitridae22006-62%1980
Western KingbirdTyrannidae22023-55%1977
PhainopeplaPtiliogonatidae21972n/an/a
LeConte's ThrasherMimidae21972n/an/a
Pied-billed GrebePodicipedidae21978n/an/a
Cinnamon TealAnatidae21998-92%1978
Turkey VultureCathartidae22023+0%1991
Lark SparrowPasserellidae22023-50%1992
Prairie FalconFalconidae22023+0%1993
Eurasian Collared-DoveColumbidae22023-44%2014
Golden EagleAccipitridae12003-20%1977
Burrowing OwlStrigidae12014-88%1977
Black-chinned HummingbirdTrochilidae11970n/an/a

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