BirdAnalyst
BBS Route · Oregon · BCR 9

Dell Spring Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 103 species recorded across 24 survey years, no longer active.

103Species 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 →
24Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1968–1999Span
3Observers

Bird Species Found on Oregon Dell Spring

Top 40 of 103 species by most recent count. Each links to its species trend.

Species recorded on the Dell Spring 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
Red-breasted NuthatchSittidae171999-47%1970
Pine SiskinFringillidae151996-43%1972
American RobinTurdidae141999+48%1970
Canada GooseAnatidae121990n/an/a
Evening GrosbeakFringillidae111988+100%1971
Common RavenCorvidae91999+360%1971
Clark's NutcrackerCorvidae91990-8%1970
Hammond's FlycatcherTyrannidae71999-80%1974
Brewer's BlackbirdIcteridae61990-57%1970
Western TanagerCardinalidae61996-69%1970
Hairy WoodpeckerPicidae51990-16%1970
Olive-sided FlycatcherTyrannidae51999-76%1970
Yellow-headed BlackbirdIcteridae51990-89%1970
Golden-crowned KingletRegulidae51988+63%1973
Double-crested CormorantPhalacrocoracidae51989+400%1980
Steller's JayCorvidae41999-63%1970
European StarlingSturnidae41990-24%1971
Chipping SparrowPasserellidae41999-77%1970
Fox SparrowPasserellidae41996-43%1970
Townsend's SolitaireTurdidae41990-7%1970
Mountain BluebirdTurdidae41990+183%1972
Wood DuckAnatidae41984n/an/a
Gray FlycatcherTyrannidae41988n/an/a
Wilson's SnipeScolopacidae31996-33%1970
Brown-headed CowbirdIcteridae31999-52%1970
Red-winged BlackbirdIcteridae31999-67%1970
Green-tailed TowheePasserellidae31999-62%1970
Mountain ChickadeeParidae31999-85%1970
Western MeadowlarkIcteridae31987-50%1969
Common MerganserAnatidae31982n/an/a
Red-breasted SapsuckerPicidae31989+0%1984
Red-naped SapsuckerPicidae31990+200%1986
Spotted SandpiperScolopacidae21990+75%1970
Common NighthawkCaprimulgidae21999-70%1970
Western Wood-PeweeTyrannidae21999-89%1970
Cassin's FinchFringillidae21996-75%1970
Savannah SparrowPasserellidae21990-36%1970
Tree SwallowHirundinidae21990+100%1970
Cassin's VireoVireonidae21999+33%1970
Townsend's WarblerParulidae21999-50%1970

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