BirdAnalyst
BBS Route · Illinois · BCR 24

Royalton Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 98 species recorded across 23 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 →
23Years 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
4Observers

Bird Species Found on Illinois Royalton

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

Species recorded on the Royalton 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 BuntingCardinalidae1232024+54%2003
Northern CardinalCardinalidae1022024+74%2003
Canada GooseAnatidae872023+642%2006
Mourning DoveColumbidae872024+27%2003
Red-winged BlackbirdIcteridae842024-60%2003
European StarlingSturnidae722024-39%2003
House SparrowPasseridae512024+162%2003
American RobinTurdidae482024-63%2003
Field SparrowPasserellidae452024+33%2003
DickcisselCardinalidae432024-59%2003
Barn SwallowHirundinidae372024+17%2003
American CrowCorvidae322024+66%2003
Turkey VultureCathartidae302024+200%2004
Common YellowthroatParulidae272024+8%2003
Chipping SparrowPasserellidae252024+200%2003
Carolina WrenTroglodytidae252024+105%2003
Tufted TitmouseParidae232024-19%2003
Song SparrowPasserellidae222024+13%2003
Northern MockingbirdMimidae212024-17%2003
Eastern TowheePasserellidae202024+147%2003
Blue-gray GnatcatcherPolioptilidae202024+258%2003
Great Crested FlycatcherTyrannidae202024+240%2005
Eastern Wood-PeweeTyrannidae182024+59%2003
Yellow-breasted ChatIcteriidae182024+193%2003
Red-bellied WoodpeckerPicidae172024+34%2003
Eastern MeadowlarkIcteridae172024-55%2003
Brown-headed CowbirdIcteridae152024+66%2003
White-eyed VireoVireonidae152024+271%2004
Blue GrosbeakCardinalidae142024+213%2004
Wood ThrushTurdidae132024+217%2006
Carolina ChickadeeParidae122024-29%2003
Eastern BluebirdTurdidae122024+67%2003
Yellow-billed CuckooCuculidae102024-61%2003
Blue JayCorvidae102024-21%2003
KilldeerCharadriidae92024-70%2003
Downy WoodpeckerPicidae92024+14%2003
Eastern PhoebeTyrannidae92024+280%2003
Common GrackleIcteridae92024-91%2003
Great EgretArdeidae92023+150%2021
Northern BobwhiteOdontophoridae82024-80%2003

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