BirdAnalyst
BBS Route · Illinois · BCR 24

Cave In Rock Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 98 species recorded across 21 survey years, still active.

98Species 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 →
21Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1993–2024Span
5Observers

Bird Species Found on Illinois Cave In Rock

Top 40 of 98 species by most recent count. Each links to its species trend.

Species recorded on the Cave In Rock 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
Indigo BuntingCardinalidae652024+9%1995
American CrowCorvidae512024+38%1995
Northern CardinalCardinalidae422024-10%1995
Brown-headed CowbirdIcteridae412024+1%1995
Carolina WrenTroglodytidae372024+67%1995
White-eyed VireoVireonidae332024+86%1995
European StarlingSturnidae312024-70%1995
House SparrowPasseridae302024+42%1995
Eastern Wood-PeweeTyrannidae282024+46%1995
Barn SwallowHirundinidae252024+27%1995
Tufted TitmouseParidae242024+5%1995
Chipping SparrowPasserellidae202024+123%1995
Mourning DoveColumbidae192024-12%1995
Acadian FlycatcherTyrannidae18202413×1998
Common YellowthroatParulidae182024+92%1995
American GoldfinchFringillidae162024-10%1995
Blue-gray GnatcatcherPolioptilidae162024+135%1995
Turkey VultureCathartidae152024-30%1995
Red-winged BlackbirdIcteridae152024+7%1995
Cliff SwallowHirundinidae152024+21%2019
Red-bellied WoodpeckerPicidae132024+53%1995
Field SparrowPasserellidae132024-59%1995
Summer TanagerCardinalidae132024+13%1995
Yellow-breasted ChatIcteriidae132024-22%1995
White-breasted NuthatchSittidae122024+264%1995
Common GrackleIcteridae112024-86%1995
American RobinTurdidae112024-70%1995
Eastern BluebirdTurdidae112024-61%1995
Eurasian Collared-DoveColumbidae112018n/an/a
Eastern KingbirdTyrannidae102024+0%1995
Blue GrosbeakCardinalidae102024+136%1997
Yellow-billed CuckooCuculidae82024-16%1995
Kentucky WarblerParulidae82024+117%1995
Carolina ChickadeeParidae82024-20%1995
Eastern TowheePasserellidae72024-57%1995
Cedar WaxwingBombycillidae72024+100%1997
Red-eyed VireoVireonidae72024+128%1995
Northern MockingbirdMimidae72024-50%1995
Pileated WoodpeckerPicidae62024+70%1995
Downy WoodpeckerPicidae52024+182%1995

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