BirdAnalyst
BBS Route · California · BCR 32

Carrizo Pln Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 62 species recorded across 36 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 →
36Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1970–2025Span
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
American CootRallidae881978n/an/a
Common RavenCorvidae702025+128%1977
Horned LarkAlaudidae592025-91%1977
Mourning DoveColumbidae202025-85%1977
Western MeadowlarkIcteridae192025-72%1977
Loggerhead ShrikeLaniidae162025-24%1977
Forster's TernLaridae151991n/an/a
Cliff SwallowHirundinidae102014-14%1981
Green-winged TealAnatidae101978n/an/a
Northern PintailAnatidae101978n/an/a
Short-eared OwlStrigidae102011-55%1993
Northern Rough-winged SwallowHirundinidae92021-68%1970
House FinchFringillidae92025-70%1978
American AvocetRecurvirostridae92023-74%1992
Tricolored BlackbirdIcteridae92011+34%1995
Red-tailed HawkAccipitridae82025+217%1977
Black-necked StiltRecurvirostridae71998-13%1970
American KestrelFalconidae52025+40%1994
European StarlingSturnidae42025-59%1977
California GullLaridae41978n/an/a
Ruddy DuckAnatidae41978n/an/a
Burrowing OwlStrigidae32025-79%1977
Western KingbirdTyrannidae32025-46%1977
Bell's SparrowPasserellidae32023-18%1977
Say's PhoebeTyrannidae32025+133%1991
Savannah SparrowPasserellidae32023-73%1999
Grasshopper SparrowPasserellidae32003-89%1998
Rock WrenTroglodytidae32023+200%2006
House SparrowPasseridae22025-63%1980
PhainopeplaPtiliogonatidae21972n/an/a
LeConte's ThrasherMimidae21972n/an/a
Pied-billed GrebePodicipedidae21978n/an/a
Cinnamon TealAnatidae21998-92%1978
Northern MockingbirdMimidae22025+33%1993
Turkey VultureCathartidae22025+0%1991
Lark SparrowPasserellidae22023-50%1992
Prairie FalconFalconidae22025+0%1993
Eurasian Collared-DoveColumbidae22025-33%2014
KilldeerCharadriidae12025-50%1978
Northern HarrierAccipitridae12025-69%1980

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