BirdAnalyst
BBS Route · Illinois · BCR 22

Dudleyville Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 112 species recorded across 24 survey years, still active.

112Species 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 →
24Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2001–2025Span
2Observers

Bird Species Found on Illinois Dudleyville

Top 40 of 112 species by most recent count. Each links to its species trend.

Species recorded on the Dudleyville 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 BlackbirdIcteridae1232025-17%2003
American CrowCorvidae1212025+288%2003
European StarlingSturnidae1152025+14%2003
House SparrowPasseridae592025+6%2003
Canada GooseAnatidae462024+336%2005
American RobinTurdidae452025-41%2003
Indigo BuntingCardinalidae282025-28%2003
Barn SwallowHirundinidae262025-34%2003
Mourning DoveColumbidae242025-14%2003
Northern CardinalCardinalidae222025-15%2003
Common GrackleIcteridae202025-72%2003
DickcisselCardinalidae182025+59%2003
Song SparrowPasserellidae162025+11%2003
Eastern Wood-PeweeTyrannidae142025+13%2003
Horned LarkAlaudidae142025-43%2003
Common YellowthroatParulidae142025+37%2003
Tufted TitmouseParidae142025+27%2003
Brown-headed CowbirdIcteridae132025+6%2003
Chimney SwiftApodidae122025-63%2003
Eastern MeadowlarkIcteridae122025-59%2003
Blue GrosbeakCardinalidae122025+400%2003
Warbling VireoVireonidae122025-28%2003
Red-bellied WoodpeckerPicidae112025+0%2003
Eastern BluebirdTurdidae112025+0%2003
KilldeerCharadriidae102025-42%2003
Field SparrowPasserellidae102025+33%2003
Northern House WrenTroglodytidae102025+13%2003
Purple MartinHirundinidae92025+450%2009
Chipping SparrowPasserellidae82025-52%2003
Eastern KingbirdTyrannidae72025-6%2003
American GoldfinchFringillidae72025-15%2003
Cliff SwallowHirundinidae72025+73%2010
Double-crested CormorantPhalacrocoracidae72021+56%2011
Turkey VultureCathartidae62025+16%2003
Red-shouldered HawkAccipitridae52025+333%2012
Eastern PhoebeTyrannidae52025+38%2003
Blue JayCorvidae52025-60%2003
House FinchFringillidae52025+33%2004
Brown ThrasherMimidae52025+30%2003
White-breasted NuthatchSittidae52025-13%2003

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