BirdAnalyst
BBS Route · Indiana · BCR 24

Spencer Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 105 species recorded across 51 survey years, still active.

105Species 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 →
51Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1967–2024Span
9Observers

Bird Species Found on Indiana Spencer

Top 40 of 105 species by most recent count. Each links to its species trend.

Species recorded on the Spencer 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
European StarlingSturnidae1122024+35%1971
American CrowCorvidae1012024+64%1971
Mourning DoveColumbidae822024+16%1971
Red-winged BlackbirdIcteridae802024-67%1971
American RobinTurdidae622024+147%1971
House SparrowPasseridae512024-69%1971
Song SparrowPasserellidae492024+21%1971
Common YellowthroatParulidae432024+100%1971
Cliff SwallowHirundinidae412024+409%2002
Barn SwallowHirundinidae362024+147%1971
Northern CardinalCardinalidae352024+139%1971
Indigo BuntingCardinalidae322024-11%1971
Common GrackleIcteridae192024-88%1971
Tufted TitmouseParidae192024+157%1971
Eastern Wood-PeweeTyrannidae182024+200%1971
Field SparrowPasserellidae182024+14%1971
Eastern BluebirdTurdidae182024+206%1971
Northern House WrenTroglodytidae172024+400%1971
Chipping SparrowPasserellidae142024+375%1971
Turkey VultureCathartidae132024+94%1973
Eastern TowheePasserellidae132024+217%1971
Wood ThrushTurdidae132024+167%1971
Red-bellied WoodpeckerPicidae122024-12%1971
Blue JayCorvidae122024+327%1971
Purple MartinHirundinidae122024+227%1972
Carolina WrenTroglodytidae122024+367%1973
Warbling VireoVireonidae102024+46%1971
Yellow-throated VireoVireonidae102024+167%1976
Bank SwallowHirundinidae102007+100%1985
House FinchFringillidae92024+100%1991
DickcisselCardinalidae82022-69%1971
Wild TurkeyPhasianidae82024+150%2010
Red-headed WoodpeckerPicidae72024+94%1971
Chimney SwiftApodidae72024+15%1971
Eastern MeadowlarkIcteridae72024-64%1971
Gray CatbirdMimidae72024+4%1971
Canada GooseAnatidae72015-24%2003
Eastern KingbirdTyrannidae62024+67%1971
Great Crested FlycatcherTyrannidae62024+171%1971
Brown-headed CowbirdIcteridae62024-31%1971

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