BirdAnalyst
BBS Route · Illinois · BCR 22

Clayton Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 100 species recorded across 15 survey years, still active.

100Species 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 →
15Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2001–2025Span
6Observers

Bird Species Found on Illinois Clayton

Top 40 of 100 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 BlackbirdIcteridae462025-28%2003
American RobinTurdidae362025+10%2003
Mourning DoveColumbidae322025+29%2003
Savannah SparrowPasserellidae242019+750%2016
Eastern MeadowlarkIcteridae232025+45%2003
Indigo BuntingCardinalidae232025+627%2003
Northern CardinalCardinalidae202025+19%2003
House SparrowPasseridae202025+68%2003
DickcisselCardinalidae182025+141%2003
Song SparrowPasserellidae162025+238%2003
Chipping SparrowPasserellidae142025+436%2003
Common YellowthroatParulidae142025+400%2003
Eastern Wood-PeweeTyrannidae142025+210%2010
Brown-headed CowbirdIcteridae132025+267%2003
KilldeerCharadriidae122025+404%2003
European StarlingSturnidae122025-12%2003
Red-bellied WoodpeckerPicidae112025+81%2003
American CrowCorvidae112025-61%2003
Eastern KingbirdTyrannidae92025+427%2003
Rose-breasted GrosbeakCardinalidae92025+288%2003
Barn SwallowHirundinidae92025+79%2003
Cedar WaxwingBombycillidae92025+130%2003
Blue JayCorvidae82025-6%2003
Red-headed WoodpeckerPicidae72025+121%2003
Great Crested FlycatcherTyrannidae62025+160%2003
Field SparrowPasserellidae62025+111%2003
Brown ThrasherMimidae62025-62%2003
Northern House WrenTroglodytidae62025+917%2003
Northern BobwhiteOdontophoridae52025-79%2003
Chimney SwiftApodidae52025+8%2003
Horned LarkAlaudidae52025+213%2003
American GoldfinchFringillidae52025+283%2003
Gray CatbirdMimidae52025+600%2003
Tufted TitmouseParidae52025+90%2003
Yellow-throated VireoVireonidae52023+150%2021
Yellow-billed CuckooCuculidae42021+14%2003
Common GrackleIcteridae42025-74%2003
Warbling VireoVireonidae4202513×2008
Eurasian Collared-DoveColumbidae42025+55%2010
Wood DuckAnatidae42019+29%2017

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