BirdAnalyst
BBS Route · Illinois · BCR 22

Olney Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 110 species recorded across 49 survey years, still active.

110Species 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 →
49Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1966–2024Span
3Observers

Bird Species Found on Illinois Olney

Top 40 of 110 species by most recent count. Each links to its species trend.

Species recorded on the Olney 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 BlackbirdIcteridae502024-40%1968
Mourning DoveColumbidae302024-41%1968
American CrowCorvidae282024+205%1968
Indigo BuntingCardinalidae282024+73%1968
Northern CardinalCardinalidae272024+87%1968
European StarlingSturnidae262024+44%1968
DickcisselCardinalidae252024+33%1968
American RobinTurdidae212024+41%1968
KilldeerCharadriidae192024+173%1968
Barn SwallowHirundinidae192024-4%1968
House SparrowPasseridae192024-82%1968
Rock PigeonColumbidae162024-59%1983
Song SparrowPasserellidae132024+18%1968
Canada GooseAnatidae122023+75%2010
Eastern BluebirdTurdidae112024+20%1968
Cliff SwallowHirundinidae11202311×2021
Common YellowthroatParulidae102024-49%1968
Common GrackleIcteridae92024-85%1968
Blue GrosbeakCardinalidae92024+775%1996
Northern MockingbirdMimidae82024-17%1968
Turkey VultureCathartidae82024+725%1983
Purple MartinHirundinidae72024+15%1968
Great Crested FlycatcherTyrannidae62024+275%1970
Carolina WrenTroglodytidae62024+0%1973
Savannah SparrowPasserellidae61970n/an/a
Northern BobwhiteOdontophoridae52024-86%1968
Blue JayCorvidae52022-79%1968
Chipping SparrowPasserellidae52024+200%2000
Red-bellied WoodpeckerPicidae42024+71%1968
Eastern KingbirdTyrannidae42024-57%1968
Eastern Wood-PeweeTyrannidae42024-39%1968
American GoldfinchFringillidae42024-60%1968
Field SparrowPasserellidae42024-85%1968
Yellow-breasted ChatIcteriidae42024+38%1968
Brown ThrasherMimidae42024-52%1968
Tufted TitmouseParidae42024+200%1968
Rose-breasted GrosbeakCardinalidae42007+67%2004
American KestrelFalconidae32024+150%1969
Eastern PhoebeTyrannidae32024+100%1969
Horned LarkAlaudidae32024-70%1968

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