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BBS Route · California · BCR 32

Valyermo Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 83 species recorded across 33 survey years, still active.

83Species 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 →
33Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1970–2019Span
4Observers

Bird Species Found on California Valyermo

Top 40 of 83 species by most recent count. Each links to its species trend.

Species recorded on the Valyermo 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
Mountain ChickadeeParidae652019+102%1972
Pygmy NuthatchSittidae452018+278%1972
Violet-green SwallowHirundinidae412019-71%1972
Green-tailed TowheePasserellidae342019-41%1972
Western Wood-PeweeTyrannidae252019-7%1972
Steller's JayCorvidae252019+7%1972
Western BluebirdTurdidae252019+34%1972
Black-throated Gray WarblerParulidae202019+900%1973
Fox SparrowPasserellidae162019+33%1972
Dusky FlycatcherTyrannidae142019-16%1973
Cassin's FinchFringillidae132019-59%1972
Western TanagerCardinalidae132019+34%1972
Olive-sided FlycatcherTyrannidae122019-67%1972
Spotted TowheePasserellidae122019+347%1972
Band-tailed PigeonColumbidae102019-80%1972
Townsend's SolitaireTurdidae102016+171%1972
BushtitAegithalidae101979n/an/a
Common RavenCorvidae92019+350%1975
Purple FinchFringillidae92019+229%1973
Lawrence's GoldfinchFringillidae72018+11%1977
Mourning DoveColumbidae72019-11%1975
White-breasted NuthatchSittidae52019+746%1972
Red CrossbillFringillidae52019-47%1991
White-headed WoodpeckerPicidae42019+38%1972
Rock WrenTroglodytidae42019+43%1973
MacGillivray's WarblerParulidae42019+133%1973
Northern House WrenTroglodytidae42019+33%1973
Mountain QuailOdontophoridae32019-77%1973
American RobinTurdidae32018-38%1972
Ash-throated FlycatcherTyrannidae32019-59%1973
Black-headed GrosbeakCardinalidae32019-70%1973
Red-breasted NuthatchSittidae32019+75%1975
Nashville WarblerParulidae31996+100%1977
Lesser GoldfinchFringillidae32018+140%1981
Blue-gray GnatcatcherPolioptilidae32019+25%2015
Northern Pygmy-OwlStrigidae22012+0%1970
Red-breasted SapsuckerPicidae22016-13%1973
Acorn WoodpeckerPicidae22019-7%1972
House FinchFringillidae22018-81%1972
Pine SiskinFringillidae22018-73%1972

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