BirdAnalyst
BBS Route · Illinois · BCR 22

Clayton Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 99 species recorded across 14 survey years, still active.

99Species 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 →
14Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2001–2024Span
6Observers

Bird Species Found on Illinois Clayton

Top 40 of 99 species by most recent count. Each links to its species trend.

Species recorded on the Clayton 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-winged BlackbirdIcteridae702024+11%2003
House SparrowPasseridae582024+126%2003
American RobinTurdidae362024+83%2003
KilldeerCharadriidae352024+485%2003
Barn SwallowHirundinidae342024+137%2003
European StarlingSturnidae322024+26%2003
Savannah SparrowPasserellidae242019+750%2016
Mourning DoveColumbidae202024+98%2003
Indigo BuntingCardinalidae202024+727%2003
DickcisselCardinalidae152024+225%2003
Common YellowthroatParulidae152024+487%2003
Eastern KingbirdTyrannidae142024+436%2003
Eastern MeadowlarkIcteridae122024+32%2003
Purple MartinHirundinidae122024+650%2009
Turkey VultureCathartidae112024+104%2003
Northern House WrenTroglodytidae11202413×2003
Common GrackleIcteridae102024-70%2003
Eastern BluebirdTurdidae102024-29%2003
Chipping SparrowPasserellidae92024+391%2003
Song SparrowPasserellidae92024+229%2003
Horned LarkAlaudidae82024+238%2003
Northern CardinalCardinalidae82024+30%2003
Grasshopper SparrowPasserellidae82019+122%2009
American CrowCorvidae72024-60%2003
Warbling VireoVireonidae7202414×2008
Willow FlycatcherTyrannidae72023+600%2003
Eurasian Collared-DoveColumbidae72024+82%2010
Brown-headed CowbirdIcteridae62024+291%2003
American GoldfinchFringillidae62024+258%2003
Brown ThrasherMimidae62024-57%2003
Tufted TitmouseParidae62024+80%2003
Eastern PhoebeTyrannidae52024+317%2003
Blue JayCorvidae52024+33%2003
Eurasian Tree SparrowPasseridae52024+700%2016
Eastern Wood-PeweeTyrannidae52024+160%2010
Yellow-throated VireoVireonidae52023+150%2021
Northern BobwhiteOdontophoridae42024-77%2003
Yellow-billed CuckooCuculidae42021+14%2003
Red-headed WoodpeckerPicidae42024+137%2003
Red-bellied WoodpeckerPicidae42024+81%2003

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