BirdAnalyst
BBS Route · Illinois · BCR 22

Troy Grove Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 90 species recorded across 27 survey years, still active.

90Species 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 →
27Years 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 Troy Grove

Top 40 of 90 species by most recent count. Each links to its species trend.

Species recorded on the Troy Grove 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 BlackbirdIcteridae1842024+3%1995
American RobinTurdidae1002024+43%1995
Common GrackleIcteridae782024-17%1995
European StarlingSturnidae472024-54%1995
House SparrowPasseridae392024-35%1995
Barn SwallowHirundinidae312024+27%1995
KilldeerCharadriidae272024+132%1995
Brown-headed CowbirdIcteridae262024+56%1995
Song SparrowPasserellidae142024-61%1995
Mourning DoveColumbidae122024-12%1995
Eastern MeadowlarkIcteridae112024+146%1995
DickcisselCardinalidae102024+300%1995
American CrowCorvidae82024-74%1995
American GoldfinchFringillidae82024+5%1995
Common YellowthroatParulidae72024+83%1996
MallardAnatidae62019+75%1996
Chimney SwiftApodidae62024-67%1995
Vesper SparrowPasserellidae62024-40%1995
Northern CardinalCardinalidae62024+31%1995
Savannah SparrowPasserellidae62012+267%1998
Canada GooseAnatidae62019+350%2011
Wood DuckAnatidae52015+133%2001
Northern House WrenTroglodytidae52024+186%1996
Purple MartinHirundinidae52021+400%2013
Rock PigeonColumbidae42024-80%1995
Horned LarkAlaudidae42024-59%1995
Warbling VireoVireonidae42024+60%1996
Red-bellied WoodpeckerPicidae42023+167%1997
Hooded MerganserAnatidae42018n/an/a
Western MeadowlarkIcteridae32024-89%1995
Chipping SparrowPasserellidae32024-39%1996
Indigo BuntingCardinalidae32024-53%1995
Cliff SwallowHirundinidae32024+240%1995
Gray CatbirdMimidae32024+29%1995
Bank SwallowHirundinidae32005n/an/a
Eurasian Collared-DoveColumbidae32024-38%2013
Orchard OrioleIcteridae32023+100%2012
Wild TurkeyPhasianidae32016n/an/a
Ring-necked PheasantPhasianidae22011-90%1995
Blue JayCorvidae22022+0%1996

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