BirdAnalyst
BBS Route · Illinois · BCR 22

Allerton Park Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 93 species recorded across 23 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 →
23Years 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 Allerton Park

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

Species recorded on the Allerton Park 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
European StarlingSturnidae642025-52%2003
American RobinTurdidae552025-36%2003
Red-winged BlackbirdIcteridae432025-54%2003
House SparrowPasseridae432025-49%2003
DickcisselCardinalidae422025+74%2003
Mourning DoveColumbidae252025-22%2003
Eastern MeadowlarkIcteridae212025-25%2003
Northern CardinalCardinalidae162025+13%2003
Song SparrowPasserellidae152025+12%2003
KilldeerCharadriidae122025-13%2003
Brown-headed CowbirdIcteridae122025+0%2003
American CrowCorvidae102025-38%2003
Indigo BuntingCardinalidae102025+12%2003
Common GrackleIcteridae92024-82%2003
Cliff SwallowHirundinidae92025-56%2017
Northern House WrenTroglodytidae82025-22%2003
Common YellowthroatParulidae72025+100%2003
House FinchFringillidae62025+44%2004
American GoldfinchFringillidae52025-17%2003
Chipping SparrowPasserellidae52025-62%2003
Barn SwallowHirundinidae52025-74%2003
Canada GooseAnatidae42025+18%2015
American KestrelFalconidae42025-33%2003
Eastern KingbirdTyrannidae42025+0%2003
Horned LarkAlaudidae42025-95%2003
Baltimore OrioleIcteridae42022-33%2003
Turkey VultureCathartidae42023+75%2006
Northern Rough-winged SwallowHirundinidae42023+78%2007
MallardAnatidae32015+67%2009
Ring-necked PheasantPhasianidae32025-82%2003
Downy WoodpeckerPicidae32023+25%2003
Field SparrowPasserellidae32025+0%2003
Gray CatbirdMimidae32025+22%2003
White-breasted NuthatchSittidae32025+100%2005
Eurasian Collared-DoveColumbidae32019+0%2012
Rock PigeonColumbidae22019-61%2003
Red-bellied WoodpeckerPicidae22024+14%2003
Blue JayCorvidae22025-18%2003
Vesper SparrowPasserellidae22025-82%2003
Cedar WaxwingBombycillidae22025-64%2004

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