BirdAnalyst
BBS Route · Indiana · BCR 24

Clear Spring Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 110 species recorded across 42 survey years, still active.

110Species 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 →
42Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1981–2025Span
2Observers

Bird Species Found on Indiana Clear Spring

Top 40 of 110 species by most recent count. Each links to its species trend.

Species recorded on the Clear 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
Mourning DoveColumbidae762025+11%1983
Cliff SwallowHirundinidae54202535×2008
American RobinTurdidae472025+42%1983
Indigo BuntingCardinalidae392025-75%1983
Red-winged BlackbirdIcteridae352025-60%1983
European StarlingSturnidae272025+65%1983
Northern CardinalCardinalidae262025-31%1983
Common YellowthroatParulidae242025-50%1983
Song SparrowPasserellidae222025+11%1983
House SparrowPasseridae212025-85%1983
Canada GooseAnatidae212023+17%2001
American CrowCorvidae202025-39%1983
Brown-headed CowbirdIcteridae192025-48%1983
Red-eyed VireoVireonidae182025-29%1983
Tufted TitmouseParidae182025-9%1983
Wood ThrushTurdidae162025+41%1983
Eastern Wood-PeweeTyrannidae152025-19%1983
Turkey VultureCathartidae142025+17%1983
Acadian FlycatcherTyrannidae132025-39%1983
Red-bellied WoodpeckerPicidae112025+14%1983
Blue JayCorvidae112025-23%1983
Barn SwallowHirundinidae112025-36%1983
Eastern TowheePasserellidae102025-21%1983
Carolina WrenTroglodytidae102025+258%1983
KilldeerCharadriidae92025+144%1983
Northern BobwhiteOdontophoridae92025-69%1983
Purple MartinHirundinidae92025-5%1983
Northern MockingbirdMimidae92025+525%1987
Eastern BluebirdTurdidae92025-35%1983
Yellow-billed CuckooCuculidae82025-48%1983
Yellow-breasted ChatIcteriidae82025-48%1983
Carolina ChickadeeParidae82025+0%1983
Rock PigeonColumbidae72024-54%1983
Red-headed WoodpeckerPicidae72025+133%1983
Field SparrowPasserellidae72025-77%1983
Warbling VireoVireonidae72025+0%1983
Blue GrosbeakCardinalidae72025+200%1990
Chimney SwiftApodidae62025-70%1983
Eastern PhoebeTyrannidae62025+0%1983
Eastern MeadowlarkIcteridae62025-63%1983

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