BirdAnalyst
BBS Route · Illinois · BCR 22

Seneca Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 101 species recorded across 29 survey years, still active.

101Species 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 →
29Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1993–2025Span
2Observers

Bird Species Found on Illinois Seneca

Top 40 of 101 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
American RobinTurdidae1422025-5%1995
European StarlingSturnidae1032025-76%1995
Red-winged BlackbirdIcteridae792025-50%1995
Common GrackleIcteridae742025-76%1995
House SparrowPasseridae692025-62%1995
Mourning DoveColumbidae422025+6%1995
KilldeerCharadriidae342025+138%1995
Brown-headed CowbirdIcteridae31202512×1995
Barn SwallowHirundinidae242025-10%1995
Purple MartinHirundinidae22202516×2011
Song SparrowPasserellidae212025-42%1995
Northern CardinalCardinalidae202025+91%1995
Chipping SparrowPasserellidae182025-13%1995
Double-crested CormorantPhalacrocoracidae18202518×2009
Northern House WrenTroglodytidae172025+27%1995
House FinchFringillidae162025+107%1995
Indigo BuntingCardinalidae152025-46%1995
Tree SwallowHirundinidae132025+300%2004
American CrowCorvidae122025-62%1995
Eastern MeadowlarkIcteridae112025-57%1995
Horned LarkAlaudidae92025-86%1995
Vesper SparrowPasserellidae92025-34%1995
DickcisselCardinalidae92025+143%2003
Gray CatbirdMimidae92025+67%1995
Northern Rough-winged SwallowHirundinidae82025+167%1996
Chimney SwiftApodidae72025-53%1995
American GoldfinchFringillidae62025+27%1995
Rose-breasted GrosbeakCardinalidae62025+100%1999
MallardAnatidae52025+40%1996
Common YellowthroatParulidae52025-39%1995
Black-capped ChickadeeParidae52025+18%1996
Eurasian Collared-DoveColumbidae52025+50%2010
Wood DuckAnatidae42021+133%1999
Red-tailed HawkAccipitridae42024+63%1995
American KestrelFalconidae42024-56%1995
Eastern Wood-PeweeTyrannidae42025+14%1995
Red-bellied WoodpeckerPicidae42025+56%1996
Great Crested FlycatcherTyrannidae42025-25%1996
Great EgretArdeidae32013-42%1995
Ring-necked PheasantPhasianidae32025-86%1995

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