BirdAnalyst
BBS Route · Illinois · BCR 22

Bluff Spgs Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 104 species recorded across 52 survey years, still active.

104Species 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 →
52Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1967–2025Span
7Observers

Bird Species Found on Illinois Bluff Spgs

Top 40 of 104 species by most recent count. Each links to its species trend.

Species recorded on the Bluff Spgs 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 BlackbirdIcteridae882025+118%1970
DickcisselCardinalidae532025+26%1970
Mourning DoveColumbidae502025+79%1970
American RobinTurdidae392025+124%1970
Canada GooseAnatidae362025+244%1996
Eastern MeadowlarkIcteridae282025-51%1970
Brown-headed CowbirdIcteridae262025+194%1970
KilldeerCharadriidae252025+463%1971
Northern BobwhiteOdontophoridae222025-48%1970
Chipping SparrowPasserellidae192025+367%1972
Indigo BuntingCardinalidae142025+17%1970
Barn SwallowHirundinidae142025+21%1970
Northern CardinalCardinalidae112025-13%1970
Common YellowthroatParulidae102025-16%1970
House SparrowPasseridae102025-91%1970
Common GrackleIcteridae92025-76%1970
Horned LarkAlaudidae82025-96%1970
Northern House WrenTroglodytidae82025+170%1970
Red-headed WoodpeckerPicidae62025-54%1970
Eastern KingbirdTyrannidae62025+71%1970
Song SparrowPasserellidae62025-36%1970
Purple MartinHirundinidae62025+46%1971
Warbling VireoVireonidae62025+220%1970
Yellow-billed CuckooCuculidae52025+25%1970
European StarlingSturnidae52025-89%1970
Grasshopper SparrowPasserellidae52025-22%1970
Chimney SwiftApodidae42025-80%1970
Field SparrowPasserellidae42024-74%1970
Rose-breasted GrosbeakCardinalidae42025+67%1972
Black-crowned Night HeronArdeidae41974n/an/a
Upland SandpiperScolopacidae42025+40%2022
Eastern PhoebeTyrannidae32025-14%1971
Eastern Wood-PeweeTyrannidae32025+0%1970
Northern MockingbirdMimidae32025-40%1970
Gray CatbirdMimidae32025+40%1971
Brown ThrasherMimidae32024-60%1970
House FinchFringillidae32023+63%1995
Red-tailed HawkAccipitridae22021+25%1982
Willow FlycatcherTyrannidae22025+20%1974
American GoldfinchFringillidae22025-80%1970

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