BirdAnalyst
BBS Route · Illinois · BCR 24

Royalton Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 99 species recorded across 24 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 →
24Years 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
4Observers

Bird Species Found on Illinois Royalton

Top 40 of 99 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
European StarlingSturnidae1862025+1%2003
Red-winged BlackbirdIcteridae1482025-46%2003
Canada GooseAnatidae872023+642%2006
Indigo BuntingCardinalidae692025+62%2003
Mourning DoveColumbidae502025+48%2003
Northern CardinalCardinalidae502025+83%2003
American RobinTurdidae482025-55%2003
House SparrowPasseridae432025+238%2003
Tufted TitmouseParidae332025-5%2003
Barn SwallowHirundinidae322025+49%2003
Turkey VultureCathartidae312025+367%2004
DickcisselCardinalidae292025-62%2003
American CrowCorvidae282025+76%2003
KilldeerCharadriidae252025-32%2003
Chipping SparrowPasserellidae242025+275%2003
Carolina WrenTroglodytidae242025+195%2003
Common GrackleIcteridae222025-88%2003
Field SparrowPasserellidae222025+48%2003
Cliff SwallowHirundinidae222025+81%2023
Song SparrowPasserellidae202025+42%2003
Red-bellied WoodpeckerPicidae192025+30%2003
Eastern BluebirdTurdidae182025+156%2003
Eastern MeadowlarkIcteridae172025-40%2003
Northern MockingbirdMimidae172025+4%2003
Blue-gray GnatcatcherPolioptilidae172025+350%2003
Blue JayCorvidae142025-16%2003
Brown-headed CowbirdIcteridae142025+78%2003
Common YellowthroatParulidae142025+3%2003
Yellow-breasted ChatIcteriidae142025+236%2003
Northern ParulaParulidae142025+475%2005
Northern BobwhiteOdontophoridae132025-80%2003
Eastern Wood-PeweeTyrannidae122025+59%2003
Summer TanagerCardinalidae122025+475%2003
Eastern TowheePasserellidae112025+213%2003
Great Crested FlycatcherTyrannidae102025+310%2005
Horned LarkAlaudidae92025-35%2003
American GoldfinchFringillidae82025+47%2003
White-eyed VireoVireonidae82025+314%2004
Cedar WaxwingBombycillidae72025+31%2003
Carolina ChickadeeParidae72025-18%2003

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