BirdAnalyst
BBS Route · Illinois · BCR 22

Alden Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 82 species recorded across 5 survey years, still active.

82Species 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 →
5Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2019–2025Span
2Observers

Bird Species Found on Illinois Alden

Top 40 of 82 species by most recent count. Each links to its species trend.

Species recorded on the Alden 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 StarlingSturnidae1512025+47%2021
Red-winged BlackbirdIcteridae1392025-0%2021
American RobinTurdidae842025+10%2021
Mourning DoveColumbidae502025+43%2021
Canada GooseAnatidae372023+363%2019
Song SparrowPasserellidae302025-36%2021
American CrowCorvidae292025+59%2021
Barn SwallowHirundinidae262025-9%2021
House SparrowPasseridae202025-21%2021
KilldeerCharadriidae192025-7%2021
Brown-headed CowbirdIcteridae192025-26%2021
Chipping SparrowPasserellidae192025-20%2021
Indigo BuntingCardinalidae182025-17%2021
Northern CardinalCardinalidae172025-22%2021
Common GrackleIcteridae142025-57%2021
Blue JayCorvidae132025+4%2021
Common YellowthroatParulidae132025-32%2021
Rock PigeonColumbidae122025+560%2021
House FinchFringillidae122025+50%2021
Northern House WrenTroglodytidae122025-10%2021
American GoldfinchFringillidae92025-13%2021
Turkey VultureCathartidae62025+250%2021
Great Crested FlycatcherTyrannidae62023+17%2021
Eastern MeadowlarkIcteridae62025+9%2021
DickcisselCardinalidae62023+140%2021
Cedar WaxwingBombycillidae62025-39%2021
Gray CatbirdMimidae62025-36%2021
Chimney SwiftApodidae52025-46%2021
Willow FlycatcherTyrannidae52023+167%2021
Orchard OrioleIcteridae52023+60%2021
Eastern BluebirdTurdidae52025+125%2021
Eurasian Collared-DoveColumbidae52025+125%2021
Downy WoodpeckerPicidae42025-14%2021
Red-bellied WoodpeckerPicidae42025+13%2021
Henslow's SparrowPasserellidae42019n/an/a
Black-capped ChickadeeParidae42025-8%2021
Red-headed WoodpeckerPicidae32025+200%2022
Wood DuckAnatidae22019n/an/a
Eastern KingbirdTyrannidae22025-53%2021
Least FlycatcherTyrannidae22019n/an/a

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