BirdAnalyst
BBS Route · California · BCR 9

Clear Lk Res Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 146 species recorded across 41 survey years, still active.

146Species 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 →
41Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1972–2018Span
8Observers

Bird Species Found on California Clear Lk Res

Top 40 of 146 species by most recent count. Each links to its species trend.

Species recorded on the Clear Lk Res 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
Western MeadowlarkIcteridae1842018+176%1974
Horned LarkAlaudidae492018-56%1974
Canada GooseAnatidae382018+125%1974
Mourning DoveColumbidae292018-57%1974
Brewer's BlackbirdIcteridae252018-59%1974
Brewer's SparrowPasserellidae242018+10%1975
Vesper SparrowPasserellidae202018-7%1975
Common NighthawkCaprimulgidae152018-26%1977
Gray FlycatcherTyrannidae152018+443%1997
Ring-necked DuckAnatidae152017+89%1996
Common RavenCorvidae142018+417%1990
Black TernLaridae13200413×1980
Wilson's PhalaropeScolopacidae132007+217%1987
Evening GrosbeakFringillidae131991n/an/a
Savannah SparrowPasserellidae122018+33%1984
Eared GrebePodicipedidae111999+114%1980
Greater Sage-GrousePhasianidae81989+700%1972
Ash-throated FlycatcherTyrannidae82018+320%1976
Spotted TowheePasserellidae82018+367%1983
American AvocetRecurvirostridae72018+75%1975
Red-winged BlackbirdIcteridae72018+188%1974
WilletScolopacidae72018+58%1977
Red CrossbillFringillidae72014-53%1993
Brown-headed CowbirdIcteridae72018+62%1982
American WigeonAnatidae72001-30%1995
Black-billed MagpieCorvidae62018-33%1974
California QuailOdontophoridae62018+122%1980
BushtitAegithalidae62004+50%1997
Red-tailed HawkAccipitridae52018+89%1974
Pinyon JayCorvidae52016+136%1979
Chipping SparrowPasserellidae52018+113%1980
Western Wood-PeweeTyrannidae52018+133%1986
American CootRallidae51990-67%1986
Great Blue HeronArdeidae42018+150%1981
Violet-green SwallowHirundinidae41973n/an/a
European StarlingSturnidae42018+533%1983
House FinchFringillidae42017+20%1979
Lark SparrowPasserellidae42018+100%1977
Yellow-headed BlackbirdIcteridae42016-79%1986
Sage ThrasherMimidae42018-63%1980

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