BirdAnalyst
BBS Route · Indiana · BCR 24

Corydon Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 114 species recorded across 56 survey years, still active.

114Species 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 →
56Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1966–2025Span
6Observers

Bird Species Found on Indiana Corydon

Top 40 of 114 species by most recent count. Each links to its species trend.

Species recorded on the Corydon 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
American CrowCorvidae332025-15%1968
Northern CardinalCardinalidae262025-35%1968
Cliff SwallowHirundinidae25201025×2006
Indigo BuntingCardinalidae242025-64%1968
Mourning DoveColumbidae232025-45%1968
Red-eyed VireoVireonidae182025+27%1968
Song SparrowPasserellidae172025+58%1968
Acadian FlycatcherTyrannidae162025+96%1968
Eastern Wood-PeweeTyrannidae152025-36%1968
Red-bellied WoodpeckerPicidae142025+35%1968
Tufted TitmouseParidae142025-40%1968
Common YellowthroatParulidae132025+11%1968
American RobinTurdidae132025-20%1968
Common GrackleIcteridae122025-81%1968
Wood ThrushTurdidae122025-53%1968
Red-winged BlackbirdIcteridae102025-81%1968
Kentucky WarblerParulidae102025+44%1968
Black VultureCathartidae102021+333%2002
European StarlingSturnidae92025-41%1968
Northern ParulaParulidae92025+340%1977
Eastern MeadowlarkIcteridae82025-56%1968
Pileated WoodpeckerPicidae72025+8%1968
Purple MartinHirundinidae72025+173%1968
Blue-gray GnatcatcherPolioptilidae72025+46%1968
Turkey VultureCathartidae72025+700%1974
BobolinkIcteridae72006+250%1983
Great Crested FlycatcherTyrannidae62025-20%1968
American GoldfinchFringillidae62025-57%1968
Chipping SparrowPasserellidae62025-29%1968
Barn SwallowHirundinidae62025-68%1968
White-eyed VireoVireonidae62025+35%1968
Northern MockingbirdMimidae62025-14%1968
Eastern KingbirdTyrannidae52025-50%1968
Eastern TowheePasserellidae52025-61%1968
Prairie WarblerParulidae52025-12%1968
Rock PigeonColumbidae52024-47%1970
Chimney SwiftApodidae42024-39%1969
Blue JayCorvidae42025-71%1968
Brown-headed CowbirdIcteridae42025-30%1968
Summer TanagerCardinalidae42025+18%1968

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