BirdAnalyst
BBS Route · Illinois · BCR 22

Yale Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 98 species recorded across 30 survey years, still active.

98Species 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 →
30Years 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
3Observers

Bird Species Found on Illinois Yale

Top 40 of 98 species by most recent count. Each links to its species trend.

Species recorded on the Yale 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 BlackbirdIcteridae1582025+16%1995
House SparrowPasseridae992025+84%1995
American RobinTurdidae512025+26%1995
Mourning DoveColumbidae462025+46%1995
European StarlingSturnidae452025-6%1995
American CrowCorvidae292025+200%1995
Common GrackleIcteridae262025-72%1995
DickcisselCardinalidae212025+542%1995
Song SparrowPasserellidae202025+93%1995
KilldeerCharadriidae182025+106%1995
Barn SwallowHirundinidae182025-63%1995
Indigo BuntingCardinalidae172025+128%1995
Red-bellied WoodpeckerPicidae142025+220%1995
Horned LarkAlaudidae142025+7%1995
Northern CardinalCardinalidae142025+94%1995
Common YellowthroatParulidae142025+50%1996
Eastern MeadowlarkIcteridae132025-38%1995
Canada GooseAnatidae132023-55%2004
Brown-headed CowbirdIcteridae92025+93%1995
Tufted TitmouseParidae92025+400%1995
Eastern Wood-PeweeTyrannidae82025+64%1998
Great Crested FlycatcherTyrannidae72025+86%1997
Chipping SparrowPasserellidae62025-9%1996
Blue-gray GnatcatcherPolioptilidae62025+120%1998
Northern House WrenTroglodytidae62025-4%1997
Turkey VultureCathartidae62025+50%1998
Yellow-billed CuckooCuculidae52024+0%1996
Ring-necked PheasantPhasianidae42023+0%1995
Eastern BluebirdTurdidae42025+22%1997
Wild TurkeyPhasianidae42025+80%1998
Eastern PhoebeTyrannidae32025-38%1996
American GoldfinchFringillidae32023+29%1996
Yellow-breasted ChatIcteriidae32025+0%1997
Northern MockingbirdMimidae32025-44%1995
Gray CatbirdMimidae32025+80%1995
Eastern TowheePasserellidae32023-25%1998
Eastern Whip-poor-willCaprimulgidae32009-20%1998
Warbling VireoVireonidae32025-16%1998
Savannah SparrowPasserellidae32024n/an/a
Northern BobwhiteOdontophoridae22025-84%1995

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