BirdAnalyst
BBS Route · Illinois · BCR 24

Brownville Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 93 species recorded across 30 survey years, still active.

93Species 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 Brownville

Top 40 of 93 species by most recent count. Each links to its species trend.

Species recorded on the Brownville 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 BlackbirdIcteridae1112025+2%1995
Northern CardinalCardinalidae942025+176%1995
Indigo BuntingCardinalidae762025+172%1995
Common YellowthroatParulidae482025+397%1995
DickcisselCardinalidae452025+0%1995
Mourning DoveColumbidae402025+35%1995
American CrowCorvidae402025+300%1995
Field SparrowPasserellidae292025+92%1995
Northern BobwhiteOdontophoridae282025-34%1995
Chipping SparrowPasserellidae252025+667%1996
Song SparrowPasserellidae232025-42%1995
American RobinTurdidae202025-27%1995
American GoldfinchFringillidae182025+138%1995
Yellow-breasted ChatIcteriidae182025+38%1995
Carolina WrenTroglodytidae182025+182%1995
Eastern MeadowlarkIcteridae172025-71%1995
Blue GrosbeakCardinalidae15202513×2004
European StarlingSturnidae132025-60%1995
Canada GooseAnatidae13202413×2012
Cliff SwallowHirundinidae132025+63%2019
Tufted TitmouseParidae112025+157%1995
Eastern Wood-PeweeTyrannidae102025+6%1995
KilldeerCharadriidae92025-30%1995
Eastern TowheePasserellidae92025-29%1995
Barn SwallowHirundinidae82025-45%1995
Brown-headed CowbirdIcteridae72025-24%1995
Eastern BluebirdTurdidae62025-57%1995
Eastern KingbirdTyrannidae52025+100%1996
Orchard OrioleIcteridae52025+133%2001
Common GrackleIcteridae52025-93%1995
Wild TurkeyPhasianidae52024+80%2009
Red-tailed HawkAccipitridae42023-20%1995
Grasshopper SparrowPasserellidae42025-70%1995
Purple MartinHirundinidae42025+38%1995
Northern MockingbirdMimidae42025-82%1995
Carolina ChickadeeParidae42025+67%1998
Bell's VireoVireonidae42025+67%2005
Kentucky WarblerParulidae42019+125%2001
Turkey VultureCathartidae32025-22%1996
Horned LarkAlaudidae32019-53%1995

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