BirdAnalyst
BBS Route · Illinois · BCR 22

Seneca Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 100 species recorded across 28 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 →
28Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1993–2024Span
2Observers

Bird Species Found on Illinois Seneca

Top 40 of 100 species by most recent count. Each links to its species trend.

Species recorded on the Seneca 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 BlackbirdIcteridae1152024-49%1995
American RobinTurdidae1142024-2%1995
House SparrowPasseridae792024-58%1995
Common GrackleIcteridae522024-80%1995
KilldeerCharadriidae452024+141%1995
European StarlingSturnidae422024-78%1995
Brown-headed CowbirdIcteridae302024+980%1995
Barn SwallowHirundinidae262024-4%1995
Purple MartinHirundinidae26202414×2011
Mourning DoveColumbidae242024+6%1995
American CrowCorvidae222024-60%1995
Northern House WrenTroglodytidae202024+36%1995
Northern CardinalCardinalidae182024+112%1995
Chipping SparrowPasserellidae142024-9%1995
Indigo BuntingCardinalidae142024-34%1995
MallardAnatidae132024+33%1996
Tree SwallowHirundinidae132024+143%2004
Horned LarkAlaudidae122024-91%1995
Eastern MeadowlarkIcteridae122024-52%1995
House FinchFringillidae122024+27%1995
Gray CatbirdMimidae122024+89%1995
Song SparrowPasserellidae112024-45%1995
Northern Rough-winged SwallowHirundinidae72023+67%1996
Brown ThrasherMimidae72024+18%1995
Blue JayCorvidae62024+63%1995
Black-capped ChickadeeParidae62024+0%1996
Eurasian Collared-DoveColumbidae62024+130%2010
DickcisselCardinalidae52024+129%2003
Wood DuckAnatidae42021+133%1999
Red-tailed HawkAccipitridae42024+63%1995
American KestrelFalconidae42024-56%1995
Vesper SparrowPasserellidae42024-29%1995
Common YellowthroatParulidae42024-35%1995
Great Blue HeronArdeidae42024-14%1996
Double-crested CormorantPhalacrocoracidae42019+300%2009
Great EgretArdeidae32013-42%1995
Ring-necked PheasantPhasianidae32022-90%1995
Chimney SwiftApodidae32024-63%1995
American GoldfinchFringillidae32024+53%1995
Red-bellied WoodpeckerPicidae32024+33%1996

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