BirdAnalyst
BBS Route · California · BCR 33

Kelso Valley Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 137 species recorded across 40 survey years, still active.

137Species 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 →
40Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1973–2025Span
3Observers

Bird Species Found on California Kelso Valley

Top 40 of 137 species by most recent count. Each links to its species trend.

Species recorded on the Kelso Valley 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
Common RavenCorvidae482025-18%1975
Ash-throated FlycatcherTyrannidae322025+122%1975
Black-throated SparrowPasserellidae312025-44%1975
California QuailOdontophoridae30202513×1975
House FinchFringillidae302025-41%1975
Western MeadowlarkIcteridae292025-26%1975
Horned LarkAlaudidae272025-73%1975
California TowheePasserellidae192025+471%1978
Western KingbirdTyrannidae162025+25%1975
House SparrowPasseridae162025+640%1992
American CrowCorvidae151976-23%1974
California Scrub-JayCorvidae122025+17%1975
Brewer's BlackbirdIcteridae112025+27%1975
Spotted TowheePasserellidae112025+250%1976
Cactus WrenTroglodytidae112025-46%1976
Mourning DoveColumbidae102025-65%1975
Rock WrenTroglodytidae92024+375%1976
Black-headed GrosbeakCardinalidae82025+64%1975
Bewick's WrenTroglodytidae82025+94%1975
BushtitAegithalidae82025+70%1976
Western Wood-PeweeTyrannidae72025+217%1975
Bullock's OrioleIcteridae72025+33%1975
Mountain ChickadeeParidae72025+167%1975
Bell's SparrowPasserellidae72025+0%1980
Red-winged BlackbirdIcteridae72025-36%1984
Eurasian Collared-DoveColumbidae72025+400%2010
European StarlingSturnidae62025+410%1976
Say's PhoebeTyrannidae62025+225%1989
Acorn WoodpeckerPicidae52025+114%1975
Brewer's SparrowPasserellidae52025-83%1975
Ladder-backed WoodpeckerPicidae52025+175%1976
Western TanagerCardinalidae52025-62%1980
Tree SwallowHirundinidae52007+400%2002
American KestrelFalconidae42025+80%1975
Lesser GoldfinchFringillidae42024-50%1976
Northern Rough-winged SwallowHirundinidae42003+14%1980
Purple FinchFringillidae42025+50%1976
Pygmy NuthatchSittidae42025-48%1984
American GoldfinchFringillidae42011+300%2004
Scott's OrioleIcteridae32025-78%1975

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